60 Meters interesting utility signal?

M0TAZM0TAZ
edited July 2018 in Signals Received
Not spotted this before, centred around 5.412 MHz.

The audio clip is here, with a CW ident I think.
https://drive.google.com/file/d/1mpuwqdVpbI1rZt2FMTc_pwvtaPdTWIS7/view?usp=sharing

It later turned into a FSK signal, same freq no pause.

The TDoA showed an interesting thing...

Any suggestions..

Dave

Attachments:
https://forum.kiwisdr.com/uploads/Uploader/49/f53d200e89443a3da4af98fee9c519.jpg
https://forum.kiwisdr.com/uploads/Uploader/5f/877067d346d29e71f38ef61e0e96ee.jpg
https://forum.kiwisdr.com/uploads/Uploader/65/c767fe5c49bcce4f5ab73406733d78.jpg

Comments

  • M0TAZM0TAZ
    In between the CW ident this was the "idle sound" https://drive.google.com/file/d/17y2mwrAM_74xjqvOrQLPEQX_p6E0AH2n/view?usp=sharing
  • jksjks
    edited July 2018
    Sounds like the marine SITOR station channel markers, e.g. TAH:

  • G8JNJG8JNJ
    Hi Dave,

    It's a fairly popular frequency, particularly with the Russians, and it could be that you are hearing (and trying to TDoA) a mix of transmissions emanating from more than one source at the same time.

    I'd suggest you join the utility monitors on UDXF@groups.io and take a look at the monthly logs in their files section.

    Regards,

    Martin - G8JNJ
  • G8JNJG8JNJ
    Forgot to add.

    This was previously mentioned in the TDoA success thread.

    I found a FSK signal with 500Hz shift on 12183KHz USB which I think comes from Istra near Moscow 55.884167, 36.953611

    So this is pretty close to your TDoA plot too.

    Regards,

    Martin - G8JNJ
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