Hello Gnu-Radio. We’ve been working to get Radio Astronomy working reliably in Gnuradio. A number of folks have made some excellent contributions to this area.
Kevin Bandura and I have been working with the Green Bank Observatory to develop horns for observation of the spiral arm structure of the Milky Way. The guides are at http://opensourceradiotelescopes.org The latest Gnuradio spectroscopy and event detection graphs are in the West Virginia University contributions to GitHub; i.e. git clone http://github.com/WVURAIL/gr-radio_astro Follow the instructions to install the graph and build the code. The documentation on the graphs are at: https://github.com/WVURAIL/gr-radio_astro/tree/master/docs There are some configuration files tuned with Radio Astronomy, but the event detection code (written in C++) should have a wide applicability for detection of glitches in your time series of samples. Attached is an image of radio transient detected in February 2019, that has the characteristics consistent with a cosmic ray flash, that is part of our science target. The radio astronomy graphs have been used with Airspy, Airspy-mini, the various RTLSDR dongles, PlutoSdr and LimeSdr hardware. Someone in Gnuradio pointed out that a lot of our code was concerned more with post process of recorded data than truly part of gnu radio. Now, all the post-processing code, and some documentation is obtained with git clone http://www.github.com/glangsto/analyze Finally, we’d like some help with one aspect of event detection. Right now we’re limited to about 6MHz bandwidth (12 MHz samples) with the existing hardware/software. We’d like to use the Analog Devices PlutoSdr internal computer to sample at a higher data rate (50 MHz or so), but only detect rare transients at a rate of once or twice a minute. We’d like to update the Pluto firmware to perform this task, while simultaneously allowing Gnuradio to run on the host pc/single board. The code is already complete, but not ported to the PlutoSdr. Anyone interested in collaborating on this project? Thanks Glen Langston
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