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Loggings => Utility => Topic started by: MDK2 on March 27, 2024, 2139 UTC

Title: USAF HFGCS message at 20 MHz?
Post by: MDK2 on March 27, 2024, 2139 UTC

I'm posting this separately from the main log diary since I've never seen this before. I found an apparent EAM on WWV's frequency of 20 MHz (20000 kHz USB) just today at 2124 UTC.

https://youtu.be/Ql7RNK5T29A

Title: Re: USAF HFGCS Message 20 MHz USB 2124 UTC 27 MAR 2024?
Post by: ~SIGINT~ on March 28, 2024, 0204 UTC

I am not sure what that transmission was all about but do not believe it to be an authentic HFGCS message.

Going through several passes of audio restoration I was able to recover the majority of the message.

AB0F1I// C6GSF 2QGLI 1UV6G 2ZD?F HYDMZ 2?01I
THIS COMPLETES MESSAGE OF 36 CHARACTERS
THIS IS ? OUT

There are a few reasons why I do not believe this message to be authentic.

a.   The literal phonetic reading of the numbers / characters;
b.   The use of the figure 0 (zero) and 1 (one); and
b.   The call sign used.

None the less, an interesting catch. Thanks for sharing.

~SIGINT~

Title: Re: USAF HFGCS Message 20 MHz USB 2124 UTC 27 MAR 2024?
Post by: MDK2 on March 28, 2024, 0522 UTC

Quote from: ~SIGINT~ on March 28, 2024, 0204 UTC

I am not sure what that transmission was all about but do not believe it to be an authentic HFGCS message.

Going through several passes of audio restoration I was able to recover the majority of the message.

AB0F1I// C6GSF 2QGLI 1UV6G 2ZD?F HYDMZ 2?01I
THIS COMPLETES MESSAGE OF 36 CHARACTERS
THIS IS ? OUT

There are a few reasons why I do not believe this message to be authentic.

a.   The literal phonetic reading of the numbers / characters;
b.   The use of the figure 0 (zero) and 1 (one); and
b.   The call sign used.

None the less, an interesting catch. Thanks for sharing.

~SIGINT~

They were calling the station "storm chaser." Thanks for your thoughts.

Title: Re: USAF HFGCS message at 20 MHz?
Post by: autovon on March 28, 2024, 1200 UTC

Interesting recording.  Sounds like a spoof to me also.

Title: Re: USAF HFGCS message at 20 MHz?
Post by: Token on March 30, 2024, 0319 UTC

Nice find, wish I had recorded it.

Sounds faked / pirate / hoax to me.  In addition to all the reasons ~SIGINT~ points out, it just sounds wrong and forced.  And the voice is synthetic, something you don't find on HFGCS.

And that leads me to why I wish I had recorded it.  I have lots of faked / hoax signals in my recordings, but never faked HFGCS traffic.

T!

Title: Re: USAF HFGCS message at 20 MHz?
Post by: MegatonRange on June 09, 2024, 1857 UTC

This was a USN station with a practice EAM prior to the April 18 2024 STRATCOM/Skymaster exercise.