HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: n0xu on June 17, 2020, 1806 UTC

Title: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: n0xu on June 17, 2020, 1806 UTC

Not sure if this belongs here, but I logged the following on multiple KiwiSDRs on the east coast. The characteristic of the signal (with one exception, noted below) was a double pulse every four seconds, (pulses of 0.04 s separated by 0.04 seconds). The signal on 5007 was of the form single pulse, double pulse, single pulse, <rinse repeat>.

The signal appeared to be a carrier centered on the frequencies below with a 2 kHz signal on on both sidebands.

I don't know if there were any signals above 9228 kHz, as these disappeared at 1730 UT.

These were received on KiwiSDRs in Uniontown, PA (W3PIE), Westminster, MD, Rockport, ME (WA2ZKD/1), but the uniformly strongest signal was on a receiver in Niantic, CT (KK1D). I was unable to perform a successful TDoA, likely because of the brief nature of the signals.

Frequencies, kHz
4610.5
5007
5225
5617
2800
6000
3183
6268
6420
6500
6803.4
6812
6843.4
7049
7321.4
7617
8125
8365
5610
8828
9235
9288

Title: Re: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: Teotwaki on June 30, 2020, 1629 UTC

For this topic area you'll find that the bulk of the loggings are hobby/pirate/homemade solar powered transmitters in the Western USA.

The following is just my opinion and Chris Smolinski is owner and architect of the forums :

Some systems such as the Russian's high power beacons almost belong in the "Utility" loggings but they are not coordinated or licensed in any sense. Commercial HF transmitters that act similar to beacons would go in the Utility area.

Commercial fishing Drift Net Beacons have their own area: https://www.hfunderground.com/board/index.php/board,40.0.html

22 Meter Band Beacons have their own area too: https://www.hfunderground.com/board/index.php/board,35.0.html

Title: Re: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: ChrisSmolinski on June 30, 2020, 1646 UTC

Sounds a lot like the Pips and other networks that Token and others have reported, mostly logged here: https://www.hfunderground.com/board/index.php/board,27.0.html

Title: Re: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: n0xu on July 02, 2020, 1557 UTC

Chris, feel free to move the post (of course). I'll log these in that forum from now on.

Thanks, Teotwaki!

Cheers!

Title: Re: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: Token on July 03, 2020, 1531 UTC

How often are you seeing these signals?  These are not the same (at least, I think they are not) as the Pips network, however I think I have seen the same signals you are talking about, the modulation you mention is familiar, but on different freqs.

T!

Title: Re: Beacon network/Sonde logging 6/17/20 1644 to 1730 UT
Post by: n0xu on July 23, 2020, 1650 UTC

This was the first logging.