HFU HF Underground
Loggings => Utility => Topic started by: Dipladocus on April 07, 2021, 0657 UTC
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I haven't listened to SDR on shortwave for a littlie while. Was listening to WRMI and i came over this USB modulation signal. Of a man Saying parts of the Phonetic Alphabet. And he would stop and say "Standby await new message" And start again. I have no idea what this is. I just was wondering if anyone know what it is. It was accompanied with a ALE2G about 2kh away. Was not able to record that part. But this is what I have.
https://youtu.be/CY0PjDFgyF8
https://youtu.be/aD_jdzutPeQ
Thanks for ya help!
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Hi.
Can you please confirm the frequency?! If it is a typo it could have been 4724,0 kHz which is a USAF frequency with an EAM - Emergency Alert Message.
Hope this helps.
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I agree with tiNG, this is probably the USAF High Frequency Global Communications System (HFGCS) at 4724 kHz. It's not technically a numbers station (it's acknowledged by the government for one), and although the messages are popularly known as Emergency Action Messages (EAM) they're generally not believed to be for genuine action most of the time. Those interested in learning more can start with wikipedia: https://en.wikipedia.org/wiki/High_Frequency_Global_Communications_System
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Hi.
Can you please confirm the frequency?! If it is a typo it could have been 4724,0 kHz which is a USAF frequency with an EAM - Emergency Alert Message.
Hope this helps.
It was confirmed 4.723 USB although it does sound like HFGCS. With all the pass recordings i heard.
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That is definitely the High Frequency Global Communications System (HFGCS). You can see later in the video that the receiver was tuned to 4724.0 kHz USB.
Primary HFGCS voice frequencies are 4724.0 kHz, 8992.0 kHz, 11175.0 kHz and 15016.0 kHz. EAMs are generally transmitted in simulcast, I.E. all 4 of the frequencies simultaneously. A daily change of call sign will also generally occur. For example, the March 29th call sign was RIDERLESS and the April 2nd call sign was PRESCOTT.
Typical message format:
02 APRIL 2021 11176.0 kHz USB (simulcast)
21:46Z
FM: PRESCOTT
ALL STATIONS ALL STATIONS, THIS IS PRESCOTT, PRESCOTT, STANDBY MESSAGE FOLLOWS
7YYVJE // GW4VA VFX44 EYY4V EOYKV JGIN
22:00Z
FM: PRESCOTT
7YYVJE // GW4VA VFX44 EYY4V EOYKV JGIN
THIS IS PRESCOTT, STANDBY, MORE TO FOLLOW
22:03Z
ALL STATIONS, ALL STATIONS THIS IS PRESCOTT, PRESCOTT BREAK
7YMYCA // TZGSC NJLEV UVOYJ RF4IR EMF6
22:05Z
ALL STATIONS, ALL STATIONS THIS IS PRESCOTT, PRESCOTT BREAK
7YEXVN // Y6JAF OZJIL FC45H II5RF GVAJ
22:08Z
ALL STATIONS, ALL STATIONS THIS IS PRESCOTT, PRESCOTT BREAK
7YEEGL // 45ZXY FNVJW IBQWU IJARY I3ED
22:10Z
ALL STATIONS, ALL STATIONS THIS IS PRESCOTT, PRESCOTT BREAK
7YZWYL // Y25RB ZD7YQ DNJKT 6KFFE RGA3
And I just so happened to have caught one while I was writing this post.
08 APRIL 2021 11176.0 kHz USB (simulcast)
00:00Z
FM: MADELINE
7Y6WGY // 2LG6S I2AXH ETEKT OOILH SWDY
RSPduo | Barker & Williamson, end-fed longwire and Wellbrook loop antennae | Toronto, Ontario Canada
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I haven't listened to SDR on shortwave for a littlie while. Was listening to WRMI and i came over this USB modulation signal. Of a man Saying parts of the Phonetic Alphabet. And he would stop and say "Standby await new message" And start again. I have no idea what this is. I just was wondering if anyone know what it is. It was accompanied with a ALE2G about 2kh away. Was not able to record that part. But this is what I have.
https://youtu.be/CY0PjDFgyF8
https://youtu.be/aD_jdzutPeQ
Thanks for ya help!
Are those YouTube videos actual videos of your reception? Or are they similar videos that you have found?
In the videos, the frequency is clearly 4724 kHz. And this is the US military used, US AF operated, HFGCS.
Some people, especially some doom porn listeners, try to correlate increased traffic on this network to world events, but the reality is that you just can't. Sure, there absolutely can be increased traffic during world events, there can also be no traffic at all during such events, and there can be increased traffic when nothing important is going on. The important take away here is that traffic on these freqs is not a harbinger of doom...but it might be...
Since this is not a numbers station I have moved the thread to the more appropriate "Utility" forum.
T!