Amateur radio, space, technology and other geeky stuff by Alexandru Csete
FM traffic and packet radio from the AO-27 amateur radio satellite. I made this recording last Saturday while testing the Gqrx software receiver using the cross yagis at OZ7SAT and the Funcube Dongle.
Continue reading “AO-27 orbit 93036 received with Gqrx and Funcube Dongle”
Please visit the new Gqrx website. The information on this page is no longer updated!
Gqrx is a software defined radio receiver for Funcube Dongle (FCD), RTL2832U-based DVB-T devices (RTL-SDR), Universal Software Radio Peripherals (USRP) and Osmo SDR devices. It is powered by GNU Radio and the Qt GUI toolkit.
Yesterday I successfully received APRS transmissions from the International Space Station on 145.825 MHz using my Yaesu FT-817 connected to my MacBook Pro via a Signalink audio interface and a USB sound adapter.
Continue reading “Qtmm souncard modem decoding APRS data from the ISS”
Last week I started on a new experiment trying to integrate the AFSK1200 demodulator code from multimon into a simple Qt-based graphical application. This experiment had two objectives:
Continue reading “Qtmm soundcard modem for decoding AFSK1200”
Up until now, users of Gpredict could click on a satellite in any view to make that satellite selected. For most views, selecting a satellite meant highlighting it and showing some additional info about it, or for the case of single satellite view to display the data for that satellite. In case you are not familiar with the terms module and view in Gpredict, a module is a logical object which groups a number of satellites and a ground station together, while views are the display widgets used to visualize the satellite data in different ways like map, list, polar plot, etc. A module can have any number of views laid out in a grid.
Continue reading “Module-wide satellite selection in Gpredict”
Qthid 3.0 – the Qt-based controller application for the Funcube Dongle – has been released. This release includes support for the full control API available with the 18f firmware for the Funcube Dongle. This should cover all the functionality provided by the “fully functional windows front-end”.
Continue reading “Qthid 3.0 with full API support released!”
Gpredict 1.3 has been packaged and released. The source code is already available from the SourceForge download site. Binary packages will follow soon.
A few days ago I tagged and packaged qthid-2.2. This release contains no new functionality compared to the 2.1 release, but it brings various user interface enhancements. In particular Mac users will find that there is now a proper application icon in the bundle.
On Tuesday I took my Funcube Dongle to our weekly meeting at OZ7SAT for testing it on the air using some bigger antennas than my Arrow antenna. We were listening for amateur radio satellites and cubesat on the 70 cm band and we were using a standard Wimo X-yagi (8 elements I think). For SDR receiver application we used modified Quisk SDR running on Ubuntu Linux.
Continue reading “Funcube Dongle on the air tests at OZ7SAT”
About a week ago I forked Howard’s qthid002 cross platform Funcube Dongle controller application with the objective of continuing development and adding support for the full FCD API that has been available since version 18f of the firmware. This first release contains various fixes for he crashes and freezes that were known to happen, providing a stable application that can be used to change frequency and upgrade the firmware from 18b to 18f.