Satellite: I'd , signal demodulation.

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CyborgSami
Posts: 2
Joined: Fri May 22, 2026 11:52 am

Satellite: I'd , signal demodulation.

#1

Unread post by CyborgSami »

Greetings,

A newbie to sdr's & satellite data feeds.

I'm picking up some infraSonic, ELF frequencies from a USO Unidentified Space Objects on my
newly acquired sdr dongle. See attachment.

What software is the best way to I'd the sat & demod the IQ signal data ?
I'm using the sdr-console. Rf-frequency analyzer app.

Cheer's
Sami
Attachments
Screenshot_20260523_150739_RF Analyzer.png
Screenshot_20260523_152056_RF Analyzer.png
Last edited by CyborgSami on Sat May 23, 2026 3:17 pm, edited 1 time in total.

jdow
Posts: 1035
Joined: Mon Aug 10, 2020 8:17 pm

Re: Satellite: I'd , signal demodulation.

#2

Unread post by jdow »

The picture did not make it. And modulo the USB dongle involved you may be seeing the dongle's imperfections. Idly, how is "infraSonic" used in this context? And how have you identified the source with any degree of precision?

{^_^}

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CyborgSami
Posts: 2
Joined: Fri May 22, 2026 11:52 am

Re: Satellite: I'd , signal demodulation.

#3

Unread post by CyborgSami »

Still a mystery. Screenshot of satillite frequencies captured with sdr.. Can clearly hear the signal tone, via the sdr. Need IQ file demodulated to reveal origin of the satillite. Satillite(s) is geo-stationary. Is the satillite friend or foe ? Who can solve this mystery ?
Attachments
InfraSonic brain wave frequencies, captured at 289. V/m
InfraSonic brain wave frequencies, captured at 289. V/m
BioSonic  frequencies captured with Sdr,  cross check with Aaronia NF-5035.
BioSonic frequencies captured with Sdr, cross check with Aaronia NF-5035.

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KA1GJU
Posts: 370
Joined: Tue Aug 11, 2020 2:16 pm

Re: Satellite: I'd , signal demodulation.

#4

Unread post by KA1GJU »

If Google image is correct, the image above is using some sort of Android SDR software, and states it's on 447.400. That frequency is in the 70cm amateur band, and more specifically... the FM repeater segment of the band. Amateur satellites are down lower in the band around 443.00 MHz and above.
As for the waterfall signals, they all look like FM to me.
Attached image is a 2m repeater (70cm repeaters are rather quiet today being a holiday) using SDR Console. This forum, as the home page states:

New Users
This bulletin board will be the primary source of help when using SDR-Radio.com software. The groups.io mailing lists will still be enabled but have a secondary role.

You may get help with other brands of SDR software, but this site is primarily for SDR Console.

Since no call sign was given, we are all at a loss as to where on this big rock called Earth you are located. The 70cm band plan may be different where you are vs us here in the USA.
Attachments
Screenshot-2026-05-25-121432.jpeg
73 Kriss KA1GJU Home of the KA1GJU Super Station SDRC Servers in NH, USA (FN42mw, FN43na, and FN42lt)

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