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Text
HDTV transmitter"
GRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. PULSEAUDIO DEVICE NAMES The list of audio devices and their names can be obtained using the command: pactl list. This will generate a lot of text and you will probably want to pipe this through less. The interesting modules are those of type “Source #” for input and “Sink #” for playback. The pulseaudio device name is then the weird text string shown underthe
HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto DAILY NOAA WEATHER SATELLITE IMAGES BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
A 2-CHANNEL AIS RECEIVER USING RTL-SDR AND GNUAIS A 2-channel AIS receiver using rtl-sdr and gnuais. For some time now I have been in great need of small and cheap AIS receivers that could be used for guiding various tracking equipment during Copenhagen Suborbitals missions. AIS stands for Automatic Identification System and is used by maritime vessels for reporting various status,including
FREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720 TURN YOUR RASPBERRY PI INTO A LIVE HDTV Please note that the information in this article is out of date and needs updating. I will do my best to update it soon. In a previous post I wrote about using the UT-100C DVB-T modulator on linux and I promised to follow up how to use the modulator with live video sources. In this Continue reading "Turn your Raspberry Pi into a liveHDTV transmitter"
GRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. PULSEAUDIO DEVICE NAMES The list of audio devices and their names can be obtained using the command: pactl list. This will generate a lot of text and you will probably want to pipe this through less. The interesting modules are those of type “Source #” for input and “Sink #” for playback. The pulseaudio device name is then the weird text string shown underthe
HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto DAILY NOAA WEATHER SATELLITE IMAGES BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
A 2-CHANNEL AIS RECEIVER USING RTL-SDR AND GNUAIS A 2-channel AIS receiver using rtl-sdr and gnuais. For some time now I have been in great need of small and cheap AIS receivers that could be used for guiding various tracking equipment during Copenhagen Suborbitals missions. AIS stands for Automatic Identification System and is used by maritime vessels for reporting various status,including
FREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720 ATX-1080 TECHNICAL OVERVIEW The ATX-1080 is a small multi band vertical antenna covering 80 – 6 meters, including the WARC bands. It is very similar to the MP-1, a major difference being that the coil is placed at the bottom. Also, the MP-1 has a continuous tuning on the coil while the ATX-1080 has fixed taps for the Continue reading "ATX-1080 Technical Overview"DX-88 OVERVIEW
DX-88 Overview. The DX-88 is a very good vertical antenna by Hy-Gain, which covers the 80, 40, 30, 20, 17, 15, 12 and 10 meter bands. With an optional kit the DX-88 can also work on 160 meters. The antenna is self supporting and comes with stainless steel hardware making it quite robust in windy conditions. Like any other vertical antenna, theGRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. DAILY NOAA WEATHER SATELLITE IMAGES Two months ago I hooked up my VHF satellite receiver to the SatNOGS network. Since then, the receiver has been receiving many different satellites, including APT images from NOAA 15, 18 and 19. The setup The receiver is basically just a test setup sitting on my desk. It consists of a 137 MHz Turnstile antenna, Continue reading "Daily NOAA weather satellite images" TUNING THE BUTTERNUT HF2V Tuning the Butternut HF2V. Like with any other multi-band vertical the different bands are coupled with each other. This means that modifying the settings on one band will influence the others. This effect is worst on the low bands (40 and below) and less noticeable on the higher bands. If you only have the basic two-band HF2V there are only MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" CUTESDR - OPEN SOURCE SDR FOR LINUX, MAC AND WINDOWS It looks like Moe Wheatley, AE4JY, is working on a cross platform software defined radio receiver intended for SDR hardware from RFSPACE. It is written using the Qt toolkit and will be available soon under an open source license with the purpose of providing an SDR interface program example for other developers. It is still Continue reading "CuteSDR – Open source SDR for Linux, Mac and SIMPLE SSB TRANSMITTER USING COMPLEX BANDPASS FILTER There are several ways to generate a single side band signal in a software radio and I am slowly exploring each and every one of them. For this first attempt I have decided to try using a basic amplitude modulation followed by a bandpass filter with complex taps that can select either the upper or Continue reading "Simple SSB transmitter using complex bandpass filter" NOAA WEATHER SATELLITE RECEPTION WITH GNU RADIO AND USRP The playback program is a simple WFM receiver where the USRP source is replaced with a file source and a throttle block. The latter is necessary to maintain a constant sample rate that was used to record the data. The video below shows the playback of the recorded IQ data from a NOAA-15 pass. If you want to use the cool sound of NOAAsatellites
USING THE RFSPACE CLOUD-IQ WITH CUTESDR ON THE RASPBERRY Type the following in the cutesdr-code subdirectory: mkdir build. cd build. qmake .. make. Wait for the build to finish, when done you should have a CuteSdr executable . Start with network settings and find your Cloud-IQ SDR, or any other RFSpace networkedGRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. DAILY NOAA WEATHER SATELLITE IMAGES HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" TURN YOUR RASPBERRY PI INTO A LIVE HDTV Please note that the information in this article is out of date and needs updating. I will do my best to update it soon. In a previous post I wrote about using the UT-100C DVB-T modulator on linux and I promised to follow up how to use the modulator with live video sources. In this Continue reading "Turn your Raspberry Pi into a liveHDTV transmitter"
SIMPLE TIME-LAPSE VIDEO WITH GTREAMER AND FFMPEG I have experienced an unexpected spin-off while fooling around with GStreamer and my Logitech QuickCam Vision Pro 9000 webcam: A simple and easy way to autonomously capture and render time-lapse videos. One of the advantages of webcams compared to other digital still and video cameras is that it can be controlled from a computer and Continue reading "Simple time-lapse video GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
TURNING THE BEAGLEBONE INTO A HIGH DEFINITION IP CAMERA Few weeks ago I posted some notes about using the Logitech HD Pro Webcam C920 with Gstreamer. I have since ported the setup to the Beaglebone, effectively turning my Beaglebone into a streaming IP camera that can deliver constant bitrate H.264 video at full 1920x1080p30 resolution without breaking a sweat. As written in the previous Continue reading "Turning the Beaglebone into aFREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720GRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. DAILY NOAA WEATHER SATELLITE IMAGES HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" TURN YOUR RASPBERRY PI INTO A LIVE HDTV Please note that the information in this article is out of date and needs updating. I will do my best to update it soon. In a previous post I wrote about using the UT-100C DVB-T modulator on linux and I promised to follow up how to use the modulator with live video sources. In this Continue reading "Turn your Raspberry Pi into a liveHDTV transmitter"
SIMPLE TIME-LAPSE VIDEO WITH GTREAMER AND FFMPEG I have experienced an unexpected spin-off while fooling around with GStreamer and my Logitech QuickCam Vision Pro 9000 webcam: A simple and easy way to autonomously capture and render time-lapse videos. One of the advantages of webcams compared to other digital still and video cameras is that it can be controlled from a computer and Continue reading "Simple time-lapse video GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
TURNING THE BEAGLEBONE INTO A HIGH DEFINITION IP CAMERA Few weeks ago I posted some notes about using the Logitech HD Pro Webcam C920 with Gstreamer. I have since ported the setup to the Beaglebone, effectively turning my Beaglebone into a streaming IP camera that can deliver constant bitrate H.264 video at full 1920x1080p30 resolution without breaking a sweat. As written in the previous Continue reading "Turning the Beaglebone into aFREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720 GPREDICT FOR WINDOWS The strategy was as follows (heavily inspired by gaim ): Create global-make.mingw that includes common flags and definitions as in gaim. We will also need a top level config.h.mingw. Build goocanvas.dll. Build sgp4sdp4.dll. Build gpredict.exe. Of course, all these will require an appropriate Makefile.mingw containing info onhow to build DLLs
ATX-1080 TECHNICAL OVERVIEW The ATX-1080 is a small multi band vertical antenna covering 80 – 6 meters, including the WARC bands. It is very similar to the MP-1, a major difference being that the coil is placed at the bottom. Also, the MP-1 has a continuous tuning on the coil while the ATX-1080 has fixed taps for the Continue reading "ATX-1080 Technical Overview" MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" RTL2832U BASED SOFTWARE DEFINED RADIOS RTL2832U-based DVB-T dongles are now supported by Gqrx SDR, see this announcement! You may have noticed the recent buzz on the internet about using cheap DVB-T dongles as software defined radio receivers. It all started on this mailing list when V4L/DVB kernel developer Antti Palosaari discovered that the ezcap EzTV 668 DVB-T/FM/DAB USB Continue reading "RTL2832U based software defined radios" CUTESDR - OPEN SOURCE SDR FOR LINUX, MAC AND WINDOWS It looks like Moe Wheatley, AE4JY, is working on a cross platform software defined radio receiver intended for SDR hardware from RFSPACE. It is written using the Qt toolkit and will be available soon under an open source license with the purpose of providing an SDR interface program example for other developers. It is still Continue reading "CuteSDR – Open source SDR for Linux, Mac and USING THE RFSPACE CLOUD-IQ WITH CUTESDR ON THE RASPBERRY Type the following in the cutesdr-code subdirectory: mkdir build. cd build. qmake .. make. Wait for the build to finish, when done you should have a CuteSdr executable . Start with network settings and find your Cloud-IQ SDR, or any other RFSpace networked A 2-CHANNEL AIS RECEIVER USING RTL-SDR AND GNUAIS A 2-channel AIS receiver using rtl-sdr and gnuais. For some time now I have been in great need of small and cheap AIS receivers that could be used for guiding various tracking equipment during Copenhagen Suborbitals missions. AIS stands for Automatic Identification System and is used by maritime vessels for reporting various status,including
SIMPLE DVB WITH GSTREAMER AND GNU RADIO Gstreamer and GNU Radio are connected using named pipes. The setup is quite functional and robust, though it suffers from the fact that the MPEG-TS muxer does not support CBR, which is required by GNU Radio and the USRP. Consequently, the video freezes every now and then for abouthalf a
GPREDICT DONWLOAD INFORMATION The latest source package can be downloaded from either GitHub or SourceForge. Unpack the source package with: tar -xvfz gpredict-x.y.z.tar.bz2. Change to the gpredict-x.y.z directory and build gpredict: ./configure make make install. The last step usually requires you to become root, otherwise you may not have the requiredpermissions to
C-BAND RECEIVER STATION C-band Receiver Station. This page describes the design of a software defined radio receiver station for the 5.6-5.9 GHz band, originally created for tracking the UNITEC-1 spacecraft on its interplanetary journey to Venus. Event logbook is available on the talk page . UNITEC-1 is the first interplanetary spacecraft built by universitystudents.
GRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. DAILY NOAA WEATHER SATELLITE IMAGES HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" TURN YOUR RASPBERRY PI INTO A LIVE HDTV Please note that the information in this article is out of date and needs updating. I will do my best to update it soon. In a previous post I wrote about using the UT-100C DVB-T modulator on linux and I promised to follow up how to use the modulator with live video sources. In this Continue reading "Turn your Raspberry Pi into a liveHDTV transmitter"
SIMPLE TIME-LAPSE VIDEO WITH GTREAMER AND FFMPEG I have experienced an unexpected spin-off while fooling around with GStreamer and my Logitech QuickCam Vision Pro 9000 webcam: A simple and easy way to autonomously capture and render time-lapse videos. One of the advantages of webcams compared to other digital still and video cameras is that it can be controlled from a computer and Continue reading "Simple time-lapse video GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
TURNING THE BEAGLEBONE INTO A HIGH DEFINITION IP CAMERA Few weeks ago I posted some notes about using the Logitech HD Pro Webcam C920 with Gstreamer. I have since ported the setup to the Beaglebone, effectively turning my Beaglebone into a streaming IP camera that can deliver constant bitrate H.264 video at full 1920x1080p30 resolution without breaking a sweat. As written in the previous Continue reading "Turning the Beaglebone into aFREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720GRC EXAMPLES
This SSB transmitter is based on the simple principle of AM modulation. The audio input modulates the “carrier”, a complex sine wave with frequency 0 Hz. The result is an AM signal, which is the filtered using a complex band pass filter to select the side band. Download the GRC file for LSB and USB. DAILY NOAA WEATHER SATELLITE IMAGES HOWTO RECEIVE AND DECODE NOAA APT IMAGES WITH THE One of the great advantages of software defined radio receivers is that tuning receiver settings is a matter of adjusting software parameters. Gqrx is no different here and has optimal settings built in for weather satellite reception. This tutorial describes how to receive automatic picture transmissions (APT) from NOAA weather satellites using Gqrx SDR, record Continue reading "Howto BUTTERNUT HF2V FOR THE 160-30 METER BANDS Butternut HF2V for the 160-30 meter bands. After my DX-88 died in a winter storm, I have decided to give the Butternut HF2V a try. This antenna is a 10 meter long vertical for 80 and 40, with extensions available for the 160 and 30 meter bands. I was rather curious about it since this is the only vertical antenna that provides the fourlower
MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" TURN YOUR RASPBERRY PI INTO A LIVE HDTV Please note that the information in this article is out of date and needs updating. I will do my best to update it soon. In a previous post I wrote about using the UT-100C DVB-T modulator on linux and I promised to follow up how to use the modulator with live video sources. In this Continue reading "Turn your Raspberry Pi into a liveHDTV transmitter"
SIMPLE TIME-LAPSE VIDEO WITH GTREAMER AND FFMPEG I have experienced an unexpected spin-off while fooling around with GStreamer and my Logitech QuickCam Vision Pro 9000 webcam: A simple and easy way to autonomously capture and render time-lapse videos. One of the advantages of webcams compared to other digital still and video cameras is that it can be controlled from a computer and Continue reading "Simple time-lapse video GPREDICT: FREE, REAL-TIME SATELLITE TRACKING AND ORBIT Gpredict is a real-time satellite tracking and orbit prediction application. It can track a large number of satellites and display their position and other data in lists, tables, maps, and polar plots (radar view). Gpredict can also predict the time of future passes for a satellite, and provide you with detailed information about eachpass.
TURNING THE BEAGLEBONE INTO A HIGH DEFINITION IP CAMERA Few weeks ago I posted some notes about using the Logitech HD Pro Webcam C920 with Gstreamer. I have since ported the setup to the Beaglebone, effectively turning my Beaglebone into a streaming IP camera that can deliver constant bitrate H.264 video at full 1920x1080p30 resolution without breaking a sweat. As written in the previous Continue reading "Turning the Beaglebone into aFREEDV FREQUENCIES
1.997 3.730 3.817 5.403 (5.355 daily DV and SSB from 1500 UTC) 7.177 7.190 14.236 14.240 18.119 21.313 24.933 28.720 GPREDICT FOR WINDOWS The strategy was as follows (heavily inspired by gaim ): Create global-make.mingw that includes common flags and definitions as in gaim. We will also need a top level config.h.mingw. Build goocanvas.dll. Build sgp4sdp4.dll. Build gpredict.exe. Of course, all these will require an appropriate Makefile.mingw containing info onhow to build DLLs
ATX-1080 TECHNICAL OVERVIEW The ATX-1080 is a small multi band vertical antenna covering 80 – 6 meters, including the WARC bands. It is very similar to the MP-1, a major difference being that the coil is placed at the bottom. Also, the MP-1 has a continuous tuning on the coil while the ATX-1080 has fixed taps for the Continue reading "ATX-1080 Technical Overview" MY FIRST WEATHER SATELLITE IMAGES WITH A 137 MHZ TURNSTILE Some time ago I got a 137 MHz turnstile antenna from Jørn OZ6TA. We decided to build an automated NOAA weather satellite image receiver using a modern SDR device. He also had an Airspy he wasn’t using and so it became the SDR radio we were going to use for this. Then life came in Continue reading "My first weather satellite images with a 137 MHz turnstile antenna" RTL2832U BASED SOFTWARE DEFINED RADIOS RTL2832U-based DVB-T dongles are now supported by Gqrx SDR, see this announcement! You may have noticed the recent buzz on the internet about using cheap DVB-T dongles as software defined radio receivers. It all started on this mailing list when V4L/DVB kernel developer Antti Palosaari discovered that the ezcap EzTV 668 DVB-T/FM/DAB USB Continue reading "RTL2832U based software defined radios" CUTESDR - OPEN SOURCE SDR FOR LINUX, MAC AND WINDOWS It looks like Moe Wheatley, AE4JY, is working on a cross platform software defined radio receiver intended for SDR hardware from RFSPACE. It is written using the Qt toolkit and will be available soon under an open source license with the purpose of providing an SDR interface program example for other developers. It is still Continue reading "CuteSDR – Open source SDR for Linux, Mac and USING THE RFSPACE CLOUD-IQ WITH CUTESDR ON THE RASPBERRY Type the following in the cutesdr-code subdirectory: mkdir build. cd build. qmake .. make. Wait for the build to finish, when done you should have a CuteSdr executable . Start with network settings and find your Cloud-IQ SDR, or any other RFSpace networked A 2-CHANNEL AIS RECEIVER USING RTL-SDR AND GNUAIS A 2-channel AIS receiver using rtl-sdr and gnuais. For some time now I have been in great need of small and cheap AIS receivers that could be used for guiding various tracking equipment during Copenhagen Suborbitals missions. AIS stands for Automatic Identification System and is used by maritime vessels for reporting various status,including
SIMPLE DVB WITH GSTREAMER AND GNU RADIO Gstreamer and GNU Radio are connected using named pipes. The setup is quite functional and robust, though it suffers from the fact that the MPEG-TS muxer does not support CBR, which is required by GNU Radio and the USRP. Consequently, the video freezes every now and then for abouthalf a
GPREDICT DONWLOAD INFORMATION The latest source package can be downloaded from either GitHub or SourceForge. Unpack the source package with: tar -xvfz gpredict-x.y.z.tar.bz2. Change to the gpredict-x.y.z directory and build gpredict: ./configure make make install. The last step usually requires you to become root, otherwise you may not have the requiredpermissions to
C-BAND RECEIVER STATION C-band Receiver Station. This page describes the design of a software defined radio receiver station for the 5.6-5.9 GHz band, originally created for tracking the UNITEC-1 spacecraft on its interplanetary journey to Venus. Event logbook is available on the talk page . UNITEC-1 is the first interplanetary spacecraft built by universitystudents.
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OSCW 2018: LIVE VIDEO FROM SPACE USING COTS HARDWARE AND OPEN SOURCESOFTWARE
Video recordings from the 2nd Open Source Cubesat Workshop are now available on YouTube,
thanks to Libre Space Foundation . This includes my presentation about the Copenhagen Suborbitals Nexø II rocket cameras and video transmitter, which you can see below. Continue reading “OSCW 2018: Live video from space using COTS hardware and open source software” Author Alexandru Csete Posted on November 21, 2018November 21, 2018Categories
DVB Tags copsub
, OSCW ,
presentation , rocketcam, video
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AVIONICS IN THE COPENHAGEN SUBORBITALS NEXØ II ROCKET Peter Scott (OZ2ABA) and myself gave a presentation at the 2018 AMSAT UK colloquium about the avionics in the Copenhagen Suborbitals Nexø II rocket. This included the radios and the DVB-S2 video transmitter used on the rocket. A video recording of the presentation is now available on the AMSAT UK YouTube channel, thanks to BATC.
Continue reading “Avionics in the Copenhagen Suborbitals Nexø IIrocket”
Author Alexandru Csete Posted on November 21, 2018November 21, 2018Categories
DVB Tags AMSAT
, avionics
, colloquium
, copsub
, presentation
, rocketcam
, video
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NEXØ II DEBRIEFING: ONBOARD CAMERAS & THE VIDEO TRANSMITTER Here is a video recording of my presentation of the onboard cameras and the video transmitter, given at the Copenhagen Suborbitals Nexø II debriefing event. Continue reading “Nexø II debriefing: Onboard cameras & the videotransmitter”
Author Alexandru Csete Posted onOctober 7, 2018
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DVB Tags copsub
, DVB ,
rocketcam , SDR
, video 0
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NEXØ II ROCKET CAMERA PERFORMANCEIn my previous post
,
I posted the raw footage recorded from the Nexø II onboard cameras. These videos give an excellent qualitative indication of how well the video downlink worked. I have now also processed the received telemetry data and have a more quantitative idea of the performance. Continue reading “Nexø II rocket camera performance” Author Alexandru Csete Posted onSeptember 9, 2018
Categories
DVB Tags copsub
, DVB ,
rocket , rocketcam
, SDR ,
video 0 Comments
RAW FOOTAGE FROM THE NEXØ II ROCKET CAMERASIn my previous
post, you could watch an edited video from the Nexø II onboard cameras. I have now also made the raw footage available on my YouTubechannel .
Continue reading “Raw footage from the Nexø II rocket cameras” Author Alexandru Csete Posted on September 8, 2018September 18, 2018Categories
DVB Tags copsub
, DVB ,
rocket , rocketcam
, SDR ,
video 0 Comments
VIDEO RECEIVED FROM THE NEXØ II ROCKET CAMERAS During the last year or two, you may have heard me talk about rocketcam or rocket-cameras, teasing with picturesbut
without providing too many technical details. Actually, it all started with a cryptic tweet I posted on October 23, 2016: Continue reading “Video received from the Nexø II rocket cameras” Author Alexandru Csete Posted on August 12, 2018September 8, 2018Categories
DVB Tags copsub
, DVB ,
rocket , rocketcam
, SDR ,
video 0 Comments
ON-AIR TESTS OF THE WIMO TA-1 TURNSTILE ANTENNA A few months ago I started looking at various options for omnidirectional antennas with circular polarization for satellite communications. I came across the TA-1 137 MHz turnstile antenna from Wimo, which looked like an interesting option for a reasonable price. Continue reading “On-air tests of the Wimo TA-1 turnstile antenna” Author Alexandru Csete Posted on January 31, 2018June 26, 2018Categories
Antennas Tags antenna, satellite
, turnstile
, VHF ,
weather , Wimo
8 Comments
GPREDICT 2.2.1 RELEASED I just wanted t let everyone know that Gpredict 2.2.1 has been released. This
release fixes some bugs that prevented windows users from updating the TLE data. It also improves the layout of the TLE sources editor. Continue reading “Gpredict 2.2.1 released” Author Alexandru Csete Posted on January 21, 2018January 19, 2020Categories
Gpredict Tags gpredict, linux
, satellite
, tracking
, windows
0 Comments
GPREDICT 2.2 RELEASED I’m happy to announce that Gpredict 2.2 has been released Continue reading “Gpredict 2.2 released” Author Alexandru Csete Posted on January 5, 2018January 21, 2018Categories
Gpredict Tags gpredict, linux
, satellite
, tracking
, windows
0 Comments
GPREDICT 2.0 RELEASED I’m happy to announce that Gpredict 2.0has been released
! This
release accumulates many features and bug fixes that have been done over the last six years. Continue reading “Gpredict 2.0 released” Author Alexandru Csete Posted on December 10, 2017January 31, 2018Categories
Gpredict Tags gpredict, linux
, satellite
, tracking
4 Comments
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