Here is a new recording showing an updated Gqrx receiving the FO-29 amateur radio satellite using the Funcube Dongle. Previous recordings used an early version of Gqrx. It was a very quiet pass, most notable thing was probably the Russian and Spanish hams using FM. They probably don’t have a clue that their signal comes over a satellite transponder. Another video recording focusing on the FM transmissions during this FO-29 pass is available here.
A year has passed since we had a Gumstix Overo based video recorder onboard an amateur rocket and it is time to resume working on it. This time I will continue towards the original goal, namely live radio transmission of video encoded using the built-in DSP.
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 them to a WAV file, and finally decode the images using the free and open source Atpdec decoder. If you follow this guide you can end up with very nice results such as the one shown at the end.
With both the frequency controller and FFT plot widgets in place gqrx was ready for the first on the air tests. The video below shows the first reception of the AO-27 amateur radio satellite during orbit 92436 and 92437, using the Funcube Dongle receiver that I use for portable space communication.
Sunday, April 10, 2011 we met at OZ7SAT to start working on our antennas. The weather is becoming better and we have a few plans for upgrading the antenna farm at AMSAT OZ headquarters.
This is the sixth satellite reception of a series recorded on Monday, February 28, 2011 using the Funcube Dongle software defined radio receiver and the Arrow II hand-held satellite antenna. The satellite is the Japanese PRISM cubesat an the recording was made in JO45KG during orbit 11343.
This is the fifth satellite reception of a series recorded on Monday, February 28, 2011 using the Funcube Dongle software defined radio receiver and the Arrow II hand-held satellite antenna. The satellite is the CUTE-1.7 + APD II cubesat – also known as CO-65 – and the recording was made in JO45KG during orbit 15341.