Friday, August 10, 2012

FLTSATCOM / AFSATCOM

Hello and welcome back.... I find this sort of listening very interesting, can't say I've heard very much but it still is fun. ( I did hear a conversation with call signs I had never heard of before)
The band of frequencies between 240mhz and 380mhz (NFM Mode) is known as the military band.
 In America it is very popular with lots of "Hits" with lots of chatter, weird call signs and various encrypted sounds.
Sometimes widening the search to 380mhz to 400mhz also is worth a go.

FLTSATCOM = Navy (260.300 - 262.550)
AFSATCOM = Air Force (243.945 - 244.250)













So what is "Fltsatcom & Afsatcom"

Fltsatcom & Afsatcom is a group of military satellites in various country's including Australia (Pine Gap), also America, Europe, South East Asia and the UK and a few others.

The main idea is to keep communications between country's while being encrypted but sometimes listeners get lucky with those in charge forgetting to hit the magic button and the conversation can be picked up in the clear.


It has been documented that a normal "Whip" antenna has been successful in receiving but something with a bit of gain would be better

A new Satellite system called MUOS (Mobile User Objective System) will up and running by the end of 2013 (1st sat was launched Feb 2012) and will run frequencies = Uplink - 300-320mhz, Downlink - 360-380mhz


FREQUENCIES (main Fleetsatcom) all in NFM - 25khz channel spacing

261.450     261.600      261.750     261.900     c = confirmed (see video below)
261.475     261.625(c)  261.775     261.925
261.500     261.650      261.800     261.950
261.525     261.675      261.825
261.550     261.700      261.850
261.575     261.725      261.875

AFSATCOM all in NFM
243.855   243.955   244.055   244.155
243.860   243.960   244.060   244.160
243.875   243.975   244.075   244.175
243.900   244.000   244.100   244.200
243.910   244.010   244.110   244.210

NAVY (dod)
251.850, 253.550, 253.850, 255.550, 256.850

DOD (Dept Of Defence)
260.375, 260.475, 261.575, 261.675, 261.775, 261.875, 263.225, 263.575, 263.675

More information is available here = http://wiki.radioreference.com/index.php/VHF/UHF_Military_Monitoring

Also put scanner into search around 240mhz to 400mhz, may never know what you will hear. :)


There's big satellites under those domes shielded so other "Spy" satellites cant see which way there facing.

























My FLTSATCOM video 1-2




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