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 EHF Package (FEP)

Description (U):

(U) The primary purpose for the FEP packages is for testing the Milstar communications terminals while providing supplemental protected communications capabilities. The FEP provides approximately 30 communications channels with 5 degree spot beam and earth coverage antennas. This is approximately 1/6 the low data rate (LDR) communications capability of a Milstar satellite. FEP being resident on a non-hardened satellite does not provide the degree of survivability inherent in a Milstar satellite. It also does not provide most of the anti-jam capability which a Milstar satellite provides.

(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.

Images (U):

This Table Is Unclassified.

Name	Title
FLTSATCOM	Fleet Satellite Communications

Related Initiatives (U):

This Table Is Unclassified.

Name	Title
AN/USC-38 (V)	AN/USC-38 (V)
Automated Comms Management Sys	Automated Communications Management System (ACMS)
Command Post Terminals (CPTs)	Command Post Terminals (CPTs)
FLTSATCOM	Fleet Satellite Communications (FLTSATCOM)
ICBM EHF Terminals	Intercontinental Ballistic Missile (ICBM) EHF Terminals
SCAMP Terminal	Single Channel Anti-Jam Man Portable (SCAMP) Terminal
SMART-T	Secure Mobile Anti-Jam Reliable Tactical-Terminal (SMART-T)
UHF Follow-on (UFO)	Ultra High Frequency (UHF) Follow-on (UFO)

Related Requirements (U): None.

Related Categories (U):

This Table Is Unclassified.

Name	Title
MILSATCOM	Military Sattelite Communications
UHF Satellite Systems	Ultra High Frequency (UHF) Satellite Systems

Road Map Placements (U):

This Table Is Unclassified.

Name	Title
Major DoD Space Programs	Evolution of the Selected Space Programs
MILSATCOM	SPACE FORCE ENHANCEMENT: MILSATCOM

Requirements, Funding and Additional Hotlinks (U):

(U) None.

Lead Office (U):

Navy.

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) 22 September 1998

(U) Road Map Production Date: 23 June 2001