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Author Topic: Massive OTH? 30 m (audio + spectrogram available)  (Read 1524 times)

Offline Dag

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Massive OTH? 30 m (audio + spectrogram available)
« on: April 06, 2014, 2348 UTC »
This signal was s9 for about 7 minutes at 2330 to about 2343z  ( local 7:30 pm EDT to 7:43 pm EDT).

This is the link https://onedrive.live.com/#cid=F98FA31C5C423B77&id=F98FA31C5C423B77!102 to the spectrogram and short audio.

Can someone confirm that this was OTH?
Seminole county, Florida, USA, Earth, Solar System, Universe.Icom 7610 + attic dipole. Black coffee. Ketosis.

Offline glimmer twin

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Re: Massive OTH? 30 m (audio + spectrogram available)
« Reply #1 on: April 07, 2014, 1008 UTC »
It certainly looks & sounds like the PLUTO OTHR from Cyprus.
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Offline Token

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Re: Massive OTH? 30 m (audio + spectrogram available)
« Reply #2 on: April 22, 2014, 0259 UTC »
It is an OTHR.  It is FM and might be FMCW or FMICW/FMOP, the bandwidth of the audio is too narrow to confirm.  It is using a 50 Hz sweep rep rate.  While there are several possibilities that fit the bill the two front runners would be the PLUTO II British radar from Akrotiri or the Russian 29B6 radar.  My guess, based on the chirp rate that is seen (how fast the radar shifts frequency in one pulse) is that this is the 29B6.  However without wider audio it is hard to say one or the other.

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