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VOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: MAINTAINING THE REQUIRED GRADE OF SERVICE The Answer. If the required SNR is 67, then the circuit reliability is predicted to be about 3.6% (REL 0.04 ie. 4%). That means you can maintain a reasonable grade of broadcasting service between Virrat and Copenhagen only on one day out of 30 days in December 2001 on thefrequency of
VOACAP CHARTS FOR RADCOM 80M: 1/4 wl Vertical 1/4 wl Vert Gd Gnd 5/8 wl Vertical 3/2 wl Vertical Vert Dipole, 0.25 wl Dipole @ 5M (17ft) Dipole @ 10M (33ft) Dipole @ 15M (50ft) Dipole @ 20M (66ft) Dipole @ 25M (82ft) Dipole @ 30M (99ft) Dipole @ 40M (132ft) Dipole @ 60M (198ft) 2-el Yagi @ 10M (33ft) 3-el Yagi @ 10M (33ft) 3-el Yagi @ 15M (50ft) 3-el Yagi @ 20M(66ft
VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: RUNNING VOACAP UNDER APPLE MACINTOSH OS X This site is dedicated to VOACAP (Voice of America Coverage Analysis Program for HF Propagation Prediction and Ionospheric Communications Analysis), an improved and corrected version of IONCAP, retaining all of the theory as put forth by John Lloyd, George Haydon, Donald Lucas and Larry Teters in the 1975-1985 time-frame with modifications which were suggested/approved by George Lane, Donald VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: ANTENNAS FOR VOACAP AND ANTENNA Vertical antennas for VOACAP. Two antennas are specified, one for receive and the other for transmit. Both are omnidirectional. The elevation angles shown are the same on all bands. Unzip and place these in a separate directory under the \antennas\ subdirectory. rxgp.zip, for receive. txgp.zip, for transmit. VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE ITS HF General information on the ITS HF Propagation Analysis Package VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: S DBW TO S METER CORRELATION TABLE VOACAP Quick Guide: Home. The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings. There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: ANTENNAS FOR VOACAP AND ANTENNA Vertical antennas for VOACAP. Two antennas are specified, one for receive and the other for transmit. Both are omnidirectional. The elevation angles shown are the same on all bands. Unzip and place these in a separate directory under the \antennas\ subdirectory. rxgp.zip, for receive. txgp.zip, for transmit. VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE ITS HF General information on the ITS HF Propagation Analysis Package VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: S DBW TO S METER CORRELATION TABLE VOACAP Quick Guide: Home. The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings. There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: ANTENNAS FOR VOACAP AND ANTENNA Vertical antennas for VOACAP. Two antennas are specified, one for receive and the other for transmit. Both are omnidirectional. The elevation angles shown are the same on all bands. Unzip and place these in a separate directory under the \antennas\ subdirectory. rxgp.zip, for receive. txgp.zip, for transmit. VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE ITS HF General information on the ITS HF Propagation Analysis Package VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: S DBW TO S METER CORRELATION TABLE VOACAP Quick Guide: Home. The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings. There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: ANTENNAS FOR VOACAP AND ANTENNA Vertical antennas for VOACAP. Two antennas are specified, one for receive and the other for transmit. Both are omnidirectional. The elevation angles shown are the same on all bands. Unzip and place these in a separate directory under the \antennas\ subdirectory. rxgp.zip, for receive. txgp.zip, for transmit. VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE ITS HF General information on the ITS HF Propagation Analysis Package VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: S DBW TO S METER CORRELATION TABLE VOACAP Quick Guide: Home. The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings. There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. REAL PROPAGATION VISUALIZED WITH FT8 DATA Real Propagation Visualized with FT8 Data VOACAP Quick Guide: Home. Explore the 50,000+ real-life propagation charts from one ITU zone to another ITU zone over the months of 2017-2019! VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: ANTENNAS FOR VOACAP AND ANTENNA Vertical antennas for VOACAP. Two antennas are specified, one for receive and the other for transmit. Both are omnidirectional. The elevation angles shown are the same on all bands. Unzip and place these in a separate directory under the \antennas\ subdirectory. rxgp.zip, for receive. txgp.zip, for transmit. VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE ITS HF General information on the ITS HF Propagation Analysis Package VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: S DBW TO S METER CORRELATION TABLE VOACAP Quick Guide: Home. The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings. There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION AND Apache/2.4 Server at www.voacap.com Port 443 VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLESEE MORE ONVOACAP.COM
VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: MAINTAINING THE REQUIRED GRADE OF SERVICE The Answer. If the required SNR is 67, then the circuit reliability is predicted to be about 3.6% (REL 0.04 ie. 4%). That means you can maintain a reasonable grade of broadcasting service between Virrat and Copenhagen only on one day out of 30 days in December 2001 on thefrequency of
VOACAP QUICK GUIDE: RUNNING VOACAP UNDER APPLE MACINTOSH OS X This site is dedicated to VOACAP (Voice of America Coverage Analysis Program for HF Propagation Prediction and Ionospheric Communications Analysis), an improved and corrected version of IONCAP, retaining all of the theory as put forth by John Lloyd, George Haydon, Donald Lucas and Larry Teters in the 1975-1985 time-frame with modifications which were suggested/approved by George Lane, Donald VOACAP QUICK GUIDE: CHOOSING THE CORRECT SUNSPOT NUMBER The trick is to get the circuit MUF predicted correctly using the smoothed International Sunspot Number from the National Geophysical Data Center. This also requires using the CCIR coefficients (same epoch as the F-days tables) and NOT the URSI-88 coefficients (a totally different solar cycle for the foF2 mixed with the old foF1 andfoE).
VOACAP QUICK GUIDE: ICEPAC TECHNICAL DESCRIPTION ICEPAC Technical Description VOACAP Quick Guide: Home Technical Description of VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONS VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: YAGI ANTENNAS Downloadable Files VOACAP Home | Antennas. Yagi antennas This is a collection of Yagi antennas, modelled using external software and saved as Type 13 files for use with VOACAP. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLE Squeezing the decibels out of a simple dipole VOACAP Home | Antennas. By Jari Perkiömäki OH6BG/OG6G. As a novice antenna modeller, immediately after the purchase of EZNEC Pro/4, I started to browse through the wealth of antenna information available on the Internet.It was soon that I found Tom's (W8JI) awesome web site, www.w8ji.com. VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction VOACAP QUICK GUIDE: HAMCAP AND TYPE 13 & 14 ANTENNAS HamCAP and Type 13 & 14 Antennas HamCAP User's Guide. By Alex Shovkoplyas, VE3NEA . HamCAP is designed to work with antenna model types 13 and 14 that are just tabulated antenna patterns, 2-D and 1-D respectively, vs. frequency. VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONSDOWNLOAD VOACAPVOACAP DXVOACAP HFVOACAP PREDICTIONVOACAP PROPAGATIONVOACAPSOFTWARE DOWNLOAD
VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: HF PROPAGATION PREDICTION ANDHAMCAP USER'S GUIDEEUROPEVOACAP HF CHARTS FOR RADCOMTEN COMMON MISTAKES IN USINGVOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA / ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software. A more comprehensive discussion about the finer details ofusing the software
VOACAP QUICK GUIDE: AN INTRODUCTION TO VOACAPW.EXE An introduction to VOACAPW.EXE VOACAP Quick Guide: Home . VOACAPW.EXE is the program module in the VOACAP program package that is responsible for VOACAP propagation calculations. VOACAP QUICK GUIDE: HAMCAP USER'S GUIDE Take these four steps to get started quickly. HOME QTH: Enter the coordinates for your home QTH under the Settings Tab. OR: from version 1.5, you can set the Home QTH simply by keeping the Ctrl button down and clicking on the map at the location of your choice!; ANTENNAS: Select the appropriate antennas under the Ant Tab. VOACAP QUICK GUIDE: METHOD 15, OR TRANSMITTER & RECEIVER Method 15, or Transmitter & Receiver Antenna Patterns VOACAP Quick Guide: Home I am learning VOACAP and have questions about Method 15. It is said that we should always compute the antenna patterns with Method 15 when we are analyzing a circuit for the first time. VOACAP QUICK GUIDE: VOACAP & VOAAREA CONTOURS VOACAP & VOAAREA contours VOACAP Quick Guide: Home . There are three files, located in the default installation at C:\itshfbc\database\, where the contour values are defined for output parameters, to be used in VOACAP graphs & VOAAREA coverage maps: VOACAP GPH VOACAP Point-to-Point parameter auto scaling info VOAPLT GPH VOACAP auto scaling data used by AREAPLTW.EXEVOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE REC533 General information on the REC533 propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: VOACAP FREQUENTLY ASKED QUESTIONSDOWNLOAD VOACAPVOACAP DXVOACAP HFVOACAP PREDICTIONVOACAP PROPAGATIONVOACAPSOFTWARE DOWNLOAD
VOACAP Frequently Asked Questions (Revised 22-FEB-96) VOACAP QuickGuide: Home
UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: PREDICTING THE TAKEOFF ANGLE PARAMETER Predicting the Takeoff Angle Parameter TANGLE VOACAP Quick Guide: Home Are both the TX and RX antennas considered while predicting the takeoff angle (TANGLE) of the transmit antenna? VOACAP QUICK GUIDE: DOWNLOADABLE FILES VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP QUICK GUIDE: AREA COVERAGE PREDICTION Area Coverage Prediction (VOAAREA) From a point-to-point circuit analysis we can proceed to an area coverage analysis. It sometimes happens that a frequency that is most suitable for a certain point-to-point circuit, is not the best possible for providing good service to a specific area. Let us take our example circuit of Pori(Finland) to
VOACAP QTH LOCATOR
Leaflet | Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL. VOACAP QTH Locator.VOACAP Online HF Predictions UNDERSTANDING HF PROPAGATION 2. Ionosphere • The ionosphere is a layer in the atmosphere where gases can be photoionized as a result of external radiation • Photoionization = a process in which a photon strips an electron from a neutral atom • On Earth, most of ionization results from the sun’s x-ray and ultraviolet (UV) radiation. The radiation is at its greatest during the daylight hours. VOACAP QUICK GUIDE: YAGI ANTENNAS Downloadable Files VOACAP Home | Antennas. Yagi antennas This is a collection of Yagi antennas, modelled using external software and saved as Type 13 files for use with VOACAP. VOACAP QUICK GUIDE: GENERAL INFORMATION ON THE VOACAP General information on the VOACAP propagation prediction model VOACAPQuick Guide: Home
VOACAP QUICK GUIDE: SQUEEZING THE DECIBELS OUT OF A SIMPLE Squeezing the decibels out of a simple dipole VOACAP Home | Antennas. By Jari Perkiömäki OH6BG/OG6G. As a novice antenna modeller, immediately after the purchase of EZNEC Pro/4, I started to browse through the wealth of antenna information available on the Internet.It was soon that I found Tom's (W8JI) awesome web site, www.w8ji.com. VOACAP.COM PROPAGATION FORECASTS VOACAP, High-Frequency Ionospheric Communications Analysis andPrediction
VOACAP PROPAGATION PLANNER ` VOACAP Propagation Planner ` Page 5 Image 2. The countries included in the DX Site collection (the Zone number and DXCC country shown above). When you are done with the input values, it’s time for VOACAP to calculate the prediction VOACAP QUICK GUIDE: HAMCAP AND TYPE 13 & 14 ANTENNAS HamCAP and Type 13 & 14 Antennas HamCAP User's Guide. By Alex Shovkoplyas, VE3NEA . HamCAP is designed to work with antenna model types 13 and 14 that are just tabulated antenna patterns, 2-D and 1-D respectively, vs. frequency. > VOACAP QUICK GUIDE>
> HF Propagation Prediction and Ionospheric Communications Analysis > ------------------------- > BY JARI PERKIÖMÄKI, OH6BG/OG6G>
> WHAT IS VOACAP?>
> VOACAP (Voice of America Coverage Analysis Program) > is free professional high-frequency (HF) propagation prediction > software from NTIA/ITS, originally developed for Voice of America> (VOA).
>
> This 'work-in-progress' guide should get you well started with the > software. A more comprehensive discussion about the finer details of > using the software can be found in George Lane's book > Signal-to-Noise Predictions Using VOACAP. A User's Guide > . The book is now > available on CD-ROM.>
> There is now also "The Official VOACAP Blog" > - well, it's not too official.>
> NOTE: Running automated scripts to access VOACAP services is > strictly prohibited unless agreed upon in advance with the VOACAP> site owners.
>
> FOLLOW ME ON TWITTER FOR THE LATEST NEWS>
> If you wish to keep abreast of the latest developments on my site, > follow me on Twitter .>
> REAL PROPAGATION VISUALIZED WITH FT8 DATA>
> Explore the 50,000+ real-life propagation charts from > one ITU zone to another ITU zone over the months of 2017-2019!>
> VOACAP ONLINE PREDICTION SERVICES>
>
>
> Point-to-Point Predictions > 11M Point-to-Point Predictions>
>
> Coverage Area Maps > 11M Coverage Area Maps>
>
>
>
>
> VOACAP Propagation Planner > Visual tool for HF contesters and DXers>
> VOACAP DX charts > Predictions for upcoming DXpeditions>
> OTHER VOACAP RELATED SERVICES>
> VOACAP Greyline>
> WHAT'S NEW?
>
> * Current International Smoothed Sunspot Numbers, Ri > , to be used in VOACAP, from SIDC > * Current Space Weather : Solar Wind, Magnetogram,> X-Rays, Protons
> * QTH Locator - find coordinates and Maidenhead > locators on Google Maps > * HOW TO RUN VOACAP UNDER APPLE MACINTOSH OS X? > - a quick guide to making text-based > VOACAP predictions>
> * Elevation-Angle Analyzer - generate > statistical elevation-angle data for HFTA>
> * Statistical elevation-angle distribution > - a case study>
>
> * Graphical User Interface for VOACAP for Linux>
> * Rockwell Collins offers VOACAP User's Guide on CD-ROM for free>
> (shipping charges apply) > * World Radio Broadcasting Stations - explore > various BC transmitting sites on Google Maps > * My blog in Finnish: VOACAP, ennusteet ja antennit>
>
> * SUNRISE AND SUNSET TIMES AROUND THE WORLD>
> * Today's Sunrise and Sunset Times by DXCC> country
>
> 1. DOWNLOADING VOACAP>
> * Download from Greg Hand's site > , all new updates of the > ITSHFBC package are available here > * Alternative direct download > , 8 Dec 2009 version> (3.1 MB)
> * Download the Fortran source codes of the VOACAP Propagation > Prediction Engine , in a > special directory as ZIP files.>
> * VOACAP for Linux by J.A.Watson (M0DNS) > , an exciting project > to make VOACAP available for Linux users. Please contribute!>
> * RELEASE 3 IS OUT! Download the new VOACAP Linux GUI, Release 3! > (1.5 MB gzipped file). Now supports Area > Coverage Maps with Jim Watson's VoaAreaPlot! This software is > supplied 'as is' without any warranty, implied or otherwise. > RIGHT-CLICK AND SAVE THE TARGET. All users of Release 1 > are strongly encouraged to upgrade, due > to the bugs in R1.>
> * VOACAP FOR LINUX SOFTWARE>
> * The voacapl application: voacapl-0.5.7.tar.gz>
> * The itshfbc directory: itshfbcFiles18Apr08.tar.gz>
>
> * The python scripts to display the output>
>
> 2. VOACAP - BACKGROUNDS & RUNNING THE PREDICTION>
> GENERAL
>
> * VOACAP Overview > * Screenshots of VOACAP > * Modelling the real-life HF communication system into VOACAP>
> * Setting VOACAP input parameters > * Circuit).">Textual circuit prediction (Run >> Circuit)
> * Graphical circuit prediction (Run > Graph) > * Area coverage prediction (VOAAREA)>
> THE CALCULATION ENGINE, VOACAPW>
> * An introduction to VOACAPW.EXE > * The FREQUENCY card in VOACAPX.DAT>
> GRAPHS & COLOURS>
> * VOACAP & VOAAREA contours > * VOACAP & VOAAREA plot colors > * Time and Run > Distance) are very informative graphs that let > you compare the output parameter values for user-specified > frequencies. The Time Plot lets you view the output parameters on a > 24-hour scale, e.g. if you want to see which of the specified > frequencies is best at the given time of day. Some parameters could > benefit from a fixed Y-scale. The Y-axis scaling info is found in > C:\itshfbc\database\voadist.gph.">Y-axis scaling for VOACAP Time &> Distance graphs
>
> 3. VOACAP - UNDERSTANDING THE PREDICTION>
> GENERAL
>
> * Ten Common Mistakes in Using VOACAP > * Field Strength vs. Signal-to-Noise > * Choosing the correct Sunspot Number > * VOACAP Predictions at Low Frequencies > * Comparing VOACAP, ICEPAC and REC533 > * Method 25: Ionospheric Parameters and Semi-thickness>
>
> MUF, SNR AND REL>
> * The MUF and SNR Distribution: Choosing the Best Frequency>
> * Understanding Above-the-MUF Predictions > * Calculating the MUFdays > * Maintaining the Required Grade of Service: Calculating the > Circuit Reliability for a Given Hour>
> SIGNAL POWER & NOISE POWER>
> * Summing Signal Power from Multiple Modes > * Calculating the Received RF Noise Power>
> ANTENNAS & RADIATION ANGLES>
> * Method 15, or Transmitter & Receiver AntennaPatterns>
> * VOACAP Angle Predictions > * Minimum Angle in VOACAP > * Predicting the Takeoff Angle Parameter TANGLE>
> CONVERSIONS
>
> * S DBW to S Meter Correlation Table > * The Z Tables>
> 4. VOACAP - CASE STUDIES>
> * VOACAP Case: Make your beacon predictions > * VOAAREA Case: RUV Gufunes>
> 5. VOACAP-RELATED PAPERS>
> * Using Propagation Predictions for HF DXing > Visalia 2010 presentation > by Dean Straw, N6BV. > * Contest Antennas. DX or Domestic, What’s Your Pleasure? > Visalia 2009 presentation > by Dean Straw, N6BV. > * What’s the Deal About “NVIS”? , > article courtesy by Dean Straw, N6BV > * Another Way to View Propagation Predictions for DXing and > Contesting Visalia 2006 > presentation by Dean Straw, N6BV. > * In Search of the Ultima Thule. Can VOACAP Help Find the Ultimate > QTH? CCF/OHDXF > presentation by Jari Perkiömäki & George Lane.>
> * Improved Guidelines for Automatic Link Establishment Operations > by George Lane>
> * Graphs for the paper>
> * Review of the High Frequency Ionospheric Communications Enhanced > Profile Analysis & Circuit (ICEPAC) Prediction Program > by George Lane > * Required Signal-to-Interference Ratios for Shortwave > Broadcasting , by George> Lane, 1997
> * Predicting Signal-to-Interference Probability in the High > Frequency Band , > by George Lane and Greg Hand, 1997 > * Strategies Using Propagation Predictions for DXing and > Contesting , by > Dean Straw, N6BV > * What is VOACAP Trying to Tell Me?>
> by Dean Straw, N6BV > * How Does VOACAP Compare With These Measurements> , by Dean
> Straw, N6BV
>
> 6. NTIA/ITS HF SOFTWARE HELP TOPICS>
> * General information on the NTIA/ITS HF Propagation Analysis> Package
>
> * VOACAP. General information - > Point-to-Point - Area Coverage - Signal-to-Interference. > Voice of America Coverage Analysis Program>
> * VOACAP Frequently Asked Questions > (22-Feb-96 Version)>
> * ICEPAC. General information > - Point-to-Point - Area Coverage - Signal-to-Interference. > Ionospheric Communications Enhanced Profile Analysis and Circuit > Prediction Program > * REC533. General information - > Point-to-Point - Area Coverage. > ITU-RS Recommendation 533. This has been updated to the ITU 1996> Version 3.
> * Data Files Frequently Asked Questions>
>
> * Helpful documents on using the propagation models>
> * History (Part 1) of HF propagation models by Ray Rosich, 1978>
> * Introduction to the ICEPAC Technical Description>
> * Excerpts from Original ICEPAC User's Manual>
> * Corrections to Man-made Noise > * Note on MUFDAYs > * High Latitude Errors > * Corrected Signal-to-Noise Ratio Distribution>
> * A Comparison of Broadcast Quality to VOACAP using Methods 21, 22,> and 30
> * VOACAP Method 30. A Long Path/Short Path Smoothing Function>
>
> 7. HAMCAP USER'S GUIDE>
> * HamCAP v1.5 User's Guide > * HamCAP and Type 13 & 14 Antennas>
> 8. ARTICLES OF INTEREST>
> ENGLISH
>
> * The Woody Woodpecker Story, Part 3> by V.
> K. Lehtoranta, OH2LX > * Jamming, or deliberate interference against radio broadcasting > stations by V. K. Lehtoranta, OH2LX > * www.radiojamming.info by Rimantas> Pleikys
>
> FINNISH
>
> * Kokeiluja Faroksella - automaattinen kelimajakoiden > kuuluvuudenmittaus vs. keliennusteet > * Tee-se-itse täsmäennuste YLE Radio Finlandin lähetyksille>
> * VOACAP ennustaa kuuluvuuden signaali-kohinasuhteen avulla>
> * VOACAP taajuussuunnittelun työkaluna > * Avaruussään vaikutuksesta HF-keliin > * Avaruussään tarkkailua IonoProbella>
> SWEDISH
>
> * VOACAP förutspår hörbarheten med hjälp av > signal-noiseförhållandet>
> JAPANESE
>
> * HamCAP 1.5 User's Guide>
> 9. TOOLS & DOWNLOADABLE FILES FOR USE WITH VOACAP>
> Find coordinates and Maidenhead grid locators just by pointing and> clicking
>
> * Browse the World with Google Maps , (start view:> World)
> * Browse the World with Google Maps , (start view:> Scandinavia)
> * World Radio Broadcasting Stations on Google Maps!> NEW
> * QTH Locator (Google Maps) , updated!>
> DOWNLOADABLES
>
> SOFTWARE
>
> * MAKEVOA.EXE for creating > VOACAP-compatible antenna models from HFTA, courtesy of R. Dean > Straw N6BV (zipped, 34 kB) > * Elevation-Angle Analyzer for VOACAP , v1.0 > * Windows program (zipped, 830 kB) for conversion > of on-line CTY.DAT to CTY.GEO . MAC AND LINUX VERSIONS > AVAILABLE UPON REQUEST! > * Perl source code for conversion of WL_CTY.DAT to> CTY.GEO
>
> COORDINATE FILES>
> Save the coordinate files (*.GEO) at C:\ITSHFBC\GEOCITY\>
> * New country coordinate list from CTY.DAT by AD1C. > * GEO file for all Zones (WAZ) . Courtesy of Peter > Ackermann DL3NAA. > * Latest Global HF Transmitter Site List . > * Latest country coordinate list by OH6BG. > * Latest NCDXF beacon coordinate list > * Finland city coordinate list>
> ANTENNA AND CONFIGURATION FILES>
> * A collection of antennas for use with VOACAP is > available. If you wish to contribute, please let me know. > * Fine-tuned VOACAP Point-to-Point parameter auto scaling settings > , English. Save as C:\ITSHFBC\DATABASE\Voacap.gph > * Fine-tuned VOACAP Point-to-Point parameter auto scaling settings > , Finnish. Tallenna nimellä > C:\ITSHFBC\DATABASE\Voacap.gph > * Fine-tuned Y-axis scaling for VOACAP Time & Distance graphs > . Save as C:\ITSHFBC\DATABASE\voadist.gph > * Fine-tuned colors for auto-contour shading for Point-to-Point > plots . Save as C:\ITSHFBC\DATABASE\Colors.gph > * 4NEC2, a free NEC-based antenna modeler and optimizer > by Arie Voors, can export antenna models > to VOACAP antenna format>
> ------------------------- > SPECIAL THANKS>
>> I wish to thank Mr George Lane for his friendship, invaluable >> comments and guidance - and his patience in this project. A >> special thank-you to Greg Hand who still maintains the code.>
> ------------------------->
> DISCLAIMER: Any software or service on this website is provided "as > is" . Use at your own risk.>
> ------------------------->
> © 2003-2020 Jari Perkiömäki OH6BG/OG6G. SSN source for all VOACAP > Online services: WDC-SILSO, Royal Observatory of Belgium, Brussels. > Last update: 2 January 2020.Details
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