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MILSATCOM is being replaced with the MUOS (Mobile User Objective System).

    

The Navy Advanced Narrowband System (ANS)/Mobile User Objective System (MUOS) is being developed as a replacement to the UFO constellation, with a production award anticipated in 2004. It will provide global SATCOM narrowband (64kpbs and below) connectivity for voice, video and data for U.S. and Allied services. The program is being executed as a multi-phased program. As the lead service for UHF MILSATCOM, the Navy (SPAWAR) has been charged with the acquisition responsibility for MUOS. The first phase, a 21-month Concept Exploration phase, was completed in July 2001. Eight industry teams of commercial and Defense Department contractors studied and recommended system concepts and architectures to meet MUOS requirements. Boeing, Globalstar, ICO/Teledesic, INMARSAT, Orbital Sciences, Lockheed Martin, Raytheon, and Spectrum Astro participated in the evaluation of military and commercial concepts.

The Mobile User Objective System (MUOS) will be a network of DOD-controlled satellites and associated ground facilities providing narrowband BLOS communication services for a worldwide population of mobile and fixed site terminal users. The ground control segment will feature a distributed, government-controlled, precedence and priority based resource management system that will be responsive to the communications requirements of commanders with apportioned resources.

Uplink frequencies are 290 - 320 MHz
Downlink frequencies are 240 - 270 MHz

Varifiable network frequencies are not available as of yet; stay tuned.

 

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THE FOLLOWING CONSISTS OF OUTDATED DATA AND IS LISTED FOR ARCHIVAL PURPOSES ONLY

MILSATCOM is run by the United States Military Satellite Communications Systems Wing of the USAF.

Spacecraft

Name	Block	Launch date/time (UTC)	COSPAR ID	Rocket	Remarks
USA-99	Block I	1994-02-07, 21:47:01	1994-009A	Titan IV(401)A
USA-115	Block I	1995-11-06, 05:15:01	1995-060A	Titan IV(401)A
USA-143	Block II	1999-04-30, 16:30:00	1999-023A	Titan IV(401)B	Launch failure
USA-157	Block II	2001-02-27, 21:20	2001-009A	Titan IV(401)B
USA-164	Block II	2002-01-16, 00:30:00	2002-001A	Titan IV(401)B
USA-169	Block II	2003-04-08, 13:43:00	2003-012A	Titan IV(401)B

 

 

US MILSATCOM UHF SATELLITE COMMUNICATIONS

MARISAT Satellites

Commercial Services Communications Packages

UHF Gapfiller Characteristics

25-kHz Narrowband Channels

Gapfiller 500-kHz Wideband Channels

 
Current Information on MARISAT Constellation

  

Fleet Satellite Communications (FLTSATCOM) Satellites

Fleetsatcom operates only 2 of it's original 8 satellites. The system has been replaced by the UFO Satellite system.

Alpha/Bravo/Charlie Frequency Bandplans - Downlinks

Channel 1:Fleet Broadcast Channels

Channel 2: 500 kHz Wideband Channels

Channels 3-11: Navy Relay Channels

Channels 12-23: AFSATCOM Narrowband Channels

 Current Information on FLTSATCOM Constellation

Leased Satellite (LEASAT)

Whiskey/X-ray/Yankee/Zulu Frequency Bandplans - Downlinks

Channel 1: Fleet Broadcast Channels

Channel 2: 500 kHz Wideband Channels

Channels 3-8: 25-kHz Navy Relay Channels

Channels 9-13: AFSATCOM Narrowband Channels

LEASAT Channel Characteristics

*Specific minimum values over the coverage areas for the full service period.


Current Information on Leasat Constellation

 

Ultra High Frequency Follow On (UFO) Satellites

November/Oscar/Papa/Quebec Frequency Bandplans - Downlinks

Note: Channel 1 is the U.S. Navy multichannel fleet broadcast channel. Channels 2-18 are fleet relay channels.
Channels 19-40 are narrowband AFSATCOM channels.


Current Information on UFO Constellation