UHF 4

USA

Spacecraft n°:

USA satellite n°:

Also known as USA 108 and UFO-4 (UHF Follow-On)

Launch data:

Designation	23467 / 95003A
Launch date	29 Jan 1995 - 01:25 UT
Launch site	CC, LC-36A
Launch vehicle	Atlas-2 (AC-112 #88)
Mission	Military: Communications
Geostationary orbit:
Perigee / Apogee	35763 x 35775 km
Eccentricity	1.42E-04
Inclination	3.34 deg
Period	1435.22 min

Spacecraft data:

Prime contractor	Hughes (Boeing Satellite Systems)
Platform	HS-601
Operator	US Navy
Mass at launch	3200 kg
Dry Mass	1545 kg
Basic shape
Dimension (m)
Solar array
Stabilization
DC power	2800 W (EOL)
Design lifetime	4 yrs - still active

Location:

Date	Position	Remarks
	178°W, inclined	till Mar 1999 when the orbit was classified, later 46°W?
April 2010	177.12° W

Tested in 170.5°W
Ultra-High Frequency (UHF) communications and Super-High Frequency (SHF) antijam command and broadcast capabilities through four pairs of geosynchronous satellites and one spare; tactical application.

Ref: #7, #15, #226 - update: 15.05.10