The effects of any budget/program decisions made since the information was collected during 1997-98 are NOT reflected in the National Security Space Road Map (NSSRM).

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(U) Fleet Satellite Communications (FLTSATCOM)

Description (U):

(U) The FLTSATCOM satellite system provides global UHF communications services between the latitudes of 70 degrees north and 70 degrees south. The satellite system supports mobile ground terminals which include the Army AN/PSC-5 Spitfire, Air Force Miniature Air Terminals, Navy Mini-DAMA terminals, the Joint (UHF) MILSATCOM Network Integrated (JMINI) control system, and Navy Battlegroup and Special Intelligence (SI) Communications. The Navy uses one 25-kHz fleet broadcast channel and nine 25-kHz fleet relay channels. Air Force Satellite Communications (AFSATCOM) uses twelve narrowband 5-kHz channels and one wideband 500-kHz National Command Authority channel. The fleet broadcast channel receives broadcasts at SHF, performs on-board processing, and downlinks at UHF.

(U) The last two Fleet Satellite Communications (FSC) satellites (7 and 8) carry the FLTSATCOM EHF Package (FEP) with a 44-gHz uplink and a 20-gHz downlink communications package. Originally developed by Lincoln Laboratory, the FEP was designed to demonstrate the operational capabilities of EHF terminals and to prove key functions of the Milstar system. The FEP package is housed in a third hexagonal module added to the satellite. The additional weight is accommodated by an improved launch vehicle and a new apogee motor. New solar cells, with higher efficiency than those used on Satellites 1 to 5 provide the added power with no increase in solar array size. The EHF package has both Earth coverage and spot beam antenna. It demodulates up to 32 received signals, processes them, and reformats and modulates them for downlink transmission. The uplinks are Frequency Division Multiple Access (FDMA) with Multiple Frequency Shifting Key (MFSK) modulation; they are combined into a single Time Division Multiplex (TDM) datastream for the downlink.

User Impact (U):

(U) To be supplied.

Programmatics (U):

(U) Operational.

• (U) Termination: 01/1997 (2QFY1997).

Images (U):

This Table Is Unclassified.

Name	Title
FLTSATCOM	Fleet Satellite Communications

Related Initiatives (U):

This Table Is Unclassified.

Name	Title
Atlas	Atlas
DMSP	Defense Meteorological Satellite Program (DMSP)
Eastern Range	Eastern Range
Enhanced Manpack UHF Terminal	Enhanced Manpack UHF Terminal (EMUT) (aka Spitfire)
Fleet EHF Package (FEP)	Fleet EHF Package (FEP)
Mini-Demand Assigned Mult Access	Mini-Demand Assigned Multiple Access (DAMA)
Network Control Station (NCS)	Network Control Station (NCS)
TIBS/TDDS	Tactical Information Broadcast System/Tactical Related Application Data Distribution System (TIBS/TDDS)
UHF Follow-on (UFO)	Ultra High Frequency (UHF) Follow-on (UFO)

Related Requirements (U): None.

Related Categories (U):

This Table Is Unclassified.

Name	Title
Satellite Operations	Satellite Operations
UHF Satellite Systems	Ultra High Frequency (UHF) Satellite Systems

Road Map Placements (U):

This Table Is Unclassified.

Name	Title
MILSATCOM	SPACE FORCE ENHANCEMENT: MILSATCOM

Requirements, Funding and Additional Hotlinks (U):

(U) None.

Lead Office (U):

Navy.

(U) DoD: USD (A&T) and OASD(C3I), Pentagon, Washington, DC
(U) Service Staff: OPNAV-N63 Pentagon, Washington, DC
(U) Major Command: NAVSPACE, Dahlgren, VA
(U) Program Office: PEO for Space, Communications and Sensors (SCS)/PMW-146, Arlington, VA

Point of Contact (U):

(U) National Security Space Road Map Team, NSSA, Open Phone: (703) 808-6040, DSN 898-6040.

Date Of Information (U):

(U) 01 August 1997

(U) Road Map Production Date: 23 June 2001