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Author Topic: High Frequency Global Communications System  (Read 27519 times)

Offline 4405486

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High Frequency Global Communications System
« on: June 02, 2010, 2103 UTC »
Here San Luis Obispo, California I have some HF-GCS observations. I don't know much about this; TNX AGN Token for ID'ing.

in progress  11,175 kHZ USB  23:19-23:21 UTC June 1 2010
phonetic letters; fair signal through heavy local broadband QRM

in progress  13,200 kHz USB 23:29-23:33 UTC June 1 2010
phonetic letters, occassional number, "I say again", "Stand-by"
distinctive final dual tone pips- good signal

in progress  13,200 kHz USB 23:49-00:03 UTC June 1-June 2 2010
noted final dual pips sent twice between small amount of traffic

complete transmission, simultaneously on:
13,200 kHz, 11,175 kHZ, 15,016 kHz ALL USB 00:15-00:18 UTC June 2 2010
Identifying final dual pips, good signals.

My impression is that these are un-recorded messages, read by operators who don't know the actual content. As this appears to be one-time encryption, usually reserved for the most sensitive traffic, I consider these Number Stations.  Unlike typical Numbers Stations that tend to transmit on the hour or the half on some fixed schedule these transmissions to the best of my limited knowledge have no fixed schedule.

Try: 4724 kHz, 6739 kHz, 8992 kHz, 11175 kHz, 13200 kHz and 15016 kHz ALL USB

I have had the best luck so far on 13200 kHz USB; sooner or later you will observe it.

Cheers
« Last Edit: June 11, 2010, 2056 UTC by 4405486 »

Offline .

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Re: High Frequency Global Communications System
« Reply #1 on: June 03, 2010, 0059 UTC »
Been listening in on 8992 & 11175 for years. I'll punch in the others you posted. Thanks!

cmradio

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Re: High Frequency Global Communications System
« Reply #2 on: June 03, 2010, 1002 UTC »
Try: 4724 kHz, 6799 kHz...

So THAT's what those two are!

I had them in memory under "odds" :D

Peace!

Offline outhouse radio

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Re: High Frequency Global Communications System
« Reply #3 on: June 03, 2010, 1653 UTC »
   I don't remember the date or exact freq  but i think it was 6850 not sure tho    i like the slight ECHO effect     i hear these stations all the time
« Last Edit: June 09, 2010, 2337 UTC by outhouse radio »

Offline 4405486

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Re: High Frequency Global Communications System
« Reply #4 on: June 09, 2010, 2216 UTC »
This excellent recording from outhouse has evidently been deleted; I can no longer download it. Hope it turns up again.
I think Outhouse radio is located in England; but, not sure.
Lack of turbulence indicated to me that echo effect was most likely due to the simultaneous reception of the same signal from several different transmitter (Relay?) sites and resultant time delays. Noted what sounded like to me was slight Teletype Machine Co-Channel interference in background- sounds a little different in SSB Mode.

Basic Internet search will provide some information and audio files; as will youtube.

I have read that this system is remotely controlled from Andrews AFB; I wonder if this is over the Internet?

I get the impression that these frequencies are primarily used for Air Craft. I would assume these Airplanes fly lower than the Ionized Propagation Layers. Must be quite a vast, intricate System.

Cheers

Offline outhouse radio

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Re: High Frequency Global Communications System
« Reply #5 on: June 09, 2010, 2233 UTC »
OOOPS I accidently deleted that recording from media fire      i will look for it in my audio files   when i find it   i will repost it    you may want to save it   as i clear my stuff off of mediafire often

Offline outhouse radio

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Re: High Frequency Global Communications System
« Reply #6 on: June 09, 2010, 2336 UTC »
OK here it is again   someone needs to save this  i will more than likely delete it again  http://www.mediafire.com/?hqx3ymmjkhw

Offline syfr

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Re: High Frequency Global Communications System
« Reply #7 on: June 11, 2010, 0101 UTC »
Activity on 11.175 has been noted for 20 years + .... lots of traffic tonight, I notice.
Kiwsdr x 2. TenTec Paragon/NRD535

Offline 4405486

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Re: High Frequency Global Communications System
« Reply #8 on: June 11, 2010, 0305 UTC »
This is new and intersting to me. I did not know about this until just recently; quite fascinating.
Observed quite a bit of activity these frequencies the last few days.
Evidently, this is yesterday's news for many; for the rest of us, if someone could permanently record Mr. Outhouse Radio's excellent and representative audio file it would be helpful. Unfortunately, I don't have the equipment or expertise. I opened up an account  in Mediafire and have attempted to file the audio sample; ditto on a flashdrive- not going to hold my breath on either attempt.
Understandably, there is not much information about this System; nor should there be; but it is interesting to observe.
At any rate, there are other recordings on the Internet and youtube.
TNX VY 73 ..

Offline drjonze

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Re: High Frequency Global Communications System
« Reply #9 on: June 11, 2010, 0407 UTC »
Hello!

8992khz USB has been very active today. It seems to be running on the half hour. I've heard it starting 23:00z to 4:00z (current time as i write this). I'm in Toronto, Canada. Its been mostly phonetic alphabet with the some numbers and phrases like ' I'll say again'. I get the impression the man reading the message is from southern US, based on the accent. 

Offline 4405486

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Re: High Frequency Global Communications System
« Reply #10 on: June 11, 2010, 0438 UTC »
It appears I have succesfully saved this recording on my flashdrive and medafile account. Couldn't repeat it if I had to, just play around with it long enough and odds are sooner or later you will be able to file it, if interested. I am not much of a "Tech Gadgeteer" when it comes to this sort of thing.

I am useing a computer at the local Cal Poly Tech/Farm School here in San Luis Obispo, California- Outdated Browser and sticky keyboard- unbelievable. A semester of "Charm School" should be required for graduation.

Again, not much about this system on Internet- these listings and comments do show up in a general search.

Must close young scholar across the way, chews here gum like a Heifer- reinstate the Draft maybe?

I'm out of here-CHEERS.
« Last Edit: June 11, 2010, 2112 UTC by 4405486 »

Offline outhouse radio

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Re: High Frequency Global Communications System
« Reply #11 on: June 11, 2010, 0456 UTC »
 chews here gum like a Hefer  <<<<<<<<<<     LOL    Good One !!!     OK GUYS   here is one from  6739        Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary    I can't remember how long ago this was    but it is a very good recording  with a FEMALE operator          http://www.mediafire.com/?dwvigj5yydm
« Last Edit: June 11, 2010, 0528 UTC by outhouse radio »

Offline outhouse radio

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Re: High Frequency Global Communications System
« Reply #12 on: June 11, 2010, 0545 UTC »
4724        Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary  ---- 8992        Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary ------ 11175      Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary ------13200      Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary ----- 15016      Aeronautical Off Route Frequency        US Air Force           Worldwide              USB        Global HF System Primary ------ are you sure your 6799 isn't 6800 instead ?? ----- 6800        HF SHARES Network           US Government      Nationwide             USB/ALE     there are a lot more freqs that you will hear these kind of broadcasts on    years ago i had heard them in the 25-26 mhz range      strange stuff indeed  im still looking to see if i have anymore audio files left    i had 40-50 before the computer crashed some did not survive and a lot got deleted by the guy who built this computer around my harddrives    if i find more i will post them      OutHouse Radio

Offline 4405486

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Re: High Frequency Global Communications System
« Reply #13 on: June 11, 2010, 2050 UTC »
I stand corrected; that should be 6739.0 kHz USB. These frequencies are from the Wikipedia article.
I have read a little about the VLF component of this system; can't help extrapolating that this in it's totality is one vast, intricate system.
My skills are outdated; but I repaired communications equipment in the
Miliatary- Went to KG 13 Crypto school at Lackland and yes I did carry a rifle and a bayonet, kids.
Cheers.

Offline 4405486

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Re: High Frequency Global Communications System
« Reply #14 on: June 12, 2010, 2113 UTC »
I briefly glanced at a page, that to me suggests the complexity of this system.
Will read in depth when I can find the time.
Several ways to find it, name of the page is: "Radio waves below 22 kHZ"
click on the lower right link: "Reception of Submarine comminication systems"
by: R. Romero and V. Lehtoranta. Enlarge the pictures, especially the second- food for thought.

I initialy googled VLF and clicked on the Wikipedia article regarding Very Low Frequencies. One of the links at the bottom is: :"Radio waves below 22 kHz"     

I was a 2819 KG 13TtyTech USMC 1973-1977 I was in the rear with the gear.
Carried a rifle and bayonet for 13 weeks in boot camp; damn things get heavy- backcharge them for my lower back.
Cheers