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Author Topic: UNID 4649.5 USB 1530 UTC 26 FEB 2022  (Read 1207 times)

Offline TRI International

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UNID 4649.5 USB 1530 UTC 26 FEB 2022
« on: February 26, 2022, 1540 UTC »
1530 UTC hearing a sonar sound like you would hear on a submarine.
1543 UTC some talking in the background but very low.
1549 UTC some type of digital signal

SINPO is 5/5/5/5/5 via  University of Twente
« Last Edit: February 26, 2022, 1549 UTC by TRI International »
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Offline ~SIGINT~

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Re: UNID 4649.5 USB 1530 UTC 26 FEB 2022
« Reply #1 on: February 26, 2022, 1551 UTC »
I have this frequency logged as RU traffic in this post:
https://www.hfunderground.com/board/index.php/topic,93452.msg298213.html#msg298213

Offline Token

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Re: UNID 4649.5 USB 1530 UTC 26 FEB 2022
« Reply #2 on: February 26, 2022, 1600 UTC »
Yes, this "sonar like" ping has been active for at least a few days.  I have looked at it, and I have no idea what it is.  It is possibly a channel marker, but if so I don't know why they need it.  It continues over the Russian traffic that is sometimes present on that frequency.

It really does sound like a movie representation of an active sonar ping.  "One ping only Vasily..."

When not heard on 4649.5 kHz USB, the ping can sometimes be heard on 4397 kHz USB, not sure what other freqs it has been on.  Since both of these freqs also have Russian voice traffic, I am not sure if there is any connection there or not.

T!
« Last Edit: February 26, 2022, 1627 UTC by Token »
T!
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Offline ~SIGINT~

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Re: UNID 4649.5 USB 1530 UTC 26 FEB 2022
« Reply #3 on: February 26, 2022, 1628 UTC »
Picking up the sonar sound along with RU traffic on 4397.0 kHz via remote SDR.

16:23 UTC 26 FEB 2022 - UNID RU traffic on 4397.00 kHz USB via remote SDR, appears to be transmitting some kind of statistics or status. Some QRM from someone whistling.

Offline Dag

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Re: UNID 4649.5 USB 1530 UTC 26 FEB 2022
« Reply #4 on: February 27, 2022, 0255 UTC »
On 4648 kHz, there's a few closely spaced carriers at 0252 z heard via KiwiSDR in Poland. http://88.220.45.111:8073//
Every few minutes, one of the carries stops transmitting and CW is heard:
I copied CW about 10 wpm:
OKTR
OKPV
OKVA
OKDL
and "?" in high speed as if by human.

dag
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