HFU HF Underground
Loggings => VHF/UHF Logs, including satellites and radiosondes => Topic started by: R4002 on January 30, 2024, 1607 UTC
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1300 UTC, strong data stream signals, approx 16 kHz wide, noted on 33.400 MHz and 35.550 MHz.
I’ve monitored strong data link signals on 33.4 MHz previously, including what I believe are Russian air defense network data links target information links for S-300 / SA-10 Grumble or S-400 / SA-21 Growler air defense anti-aircraft missile systems…but could be another military datalink. Further confusing things is the fact that paging systems are operating on 35.550 MHz and 35.540 MHz, but the signal on 35.5500 MHz is identical to the signal on 33.4000 MHz.
Lots of other data links all over the VHF low band today. Lots of what appears to be secure encrypted military voice comms and FM 30-88 MHz tactical voice comms in various languages.
G8JNJ Receiver