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Configuring Virgo for multiple SDR using the KrakenSDR SDR module #26

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anthfuller opened this issue Aug 5, 2022 · 1 comment
Open

Configuring Virgo for multiple SDR using the KrakenSDR SDR module #26

anthfuller opened this issue Aug 5, 2022 · 1 comment

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@anthfuller
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anthfuller commented Aug 5, 2022 •
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Trying to find documentation on configuring GNU Radio with Virgo for configuring multiple RTL-SDR, built integration using the new KrakenSDR. How do you configure Virgo for an Interferometer using KrakenSDR.

Any help would be much appreciated. By the way I'm using osmosdr, configured with two RTL-SDR. The KrakenSDr has all five RTL-SDR configured with an internal time source and synced. I'm not sure but believe also a fast-convolution to extract the offsets and then apply them to on-going processing, involving conjugate multiply. For the KrakenSDR, only one conjugate multiply would be required, I believe.

Trying to also figure out how to create the calibration.dat file. When I make the Virgo.Import call, the error that the CAL_FILE is missing?

Again, any help would be very much appreciate or point me in a solid direction, thank you!!

https://github.com/krakenrf/krakensdr_docs/wiki
@0xCoto
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0xCoto commented Aug 5, 2022 •
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Unfortunately Virgo does not support multiple sources at the moment, let alone interferometry. The closest you could get to observing with multiple devices instantaneously is by running multiple Virgo instances using rtl=0, rtl=1, ..., rtl=n, but that will still not combine your data interferometrically. I think your best bet is to write a custom GNU Radio pipeline for carrying out such analysis.

Regarding calibration, can you share your whole code? It shouldn't be crashing for that during the import. The calibration file is generated by observing a HI-quiet region, and then renaming the file to cal_file.dat, which you then pass as an argument to virgo.plot() in your regular observations.

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@0xCoto @anthfuller