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Re: [Discuss-gnuradio] Gnuradio and Solar Eclipse

From: Daniel Estévez
Subject: Re: [Discuss-gnuradio] Gnuradio and Solar Eclipse
Date: Thu, 31 Aug 2017 19:57:50 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0

Hi John,

Thanks for sharing.

I've also done wideband recordings of the eclipse using a similar setup:
a Hermes-Lite 2.0beta2, gr-hermeslite2 and digital_rf. I did 8 hour
recordings of the 40, 30 and 20m bands at 384ksps.

Rather than making timelapses of the spectrum, I have done high
resolution waterfalls of the recordings using Python. See



Dani EA4GPZ.

El 31/08/17 a las 19:43, John Ackermann N8UR escribió:
> As part of the HamSci (http://hamsci.org) solar eclipse experiment I
> recorded a bunch of IQ data from HF radio during the eclipse, using
> Gnuradio (plus the gr-hpsdr and gr-digital_rf modules) for all signal
> processing.
> A Red Pitaya running at 2.5 Msamples/sec recorded the entire AM
> broadcast band, and an HPSDR Hermes recorded four virtual channels, each
> at 384 ksamples/sec, covering the 80M, 40M, 30M, and 20M ham bands.  The
> data totals just under 1 TB for the 8 hours of recording.
> Initial analysis is in the form of time-lapse movies of each band that
> compress 8 hours of data (displayed in FFT form) into about 3 minutes.
> This provides a quick way to see if anything happened, and a clue where
> to zoom in for more detailed analysis.
> Rather than making this a long email with lots of boring detail and
> links, my blog at http://blog.febo.com has links to the movies on
> YouTube, as well as the Gnuradio scripts, background details, etc.
> I'm going to be talking about the eclipse experiment, as will Dr.
> Nathaniel Frissell (W2NAF), professor at New Jersey Institute of
> Technology and head of the HamSCI project, at the upcoming ARRL/TAPR
> Digital Communications Conference in St. Louis on Sep. 15-17.  Most
> Gnuradio types will find lots of interesting content at the conference,
> so if you can get to St. Louis, please join us!  Details at
> http://tapr.org/dcc.
> John
> _______________________________________________
> Discuss-gnuradio mailing list
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