DSP 3-6

USA

Spacecraft n°:

USA satellite n°:

Also known as IMEWS-19 and DSP 19 or USA 142

Launch data:

Designation	25669 / 99017A
Launch date	09 Apr 1999
Launch site	CC, LC-41
Launch vehicle	Titan-402B/IUS
Mission	Military: early warning
Geostationary orbit on:
Perigee / Apogee	km
Eccentricity
Inclination	deg
Period	min

Partiale Failure, failed to achieve correct orbit.
In late April controllers stated they have regained control over the satellite (not spinning anymore). Evaluation of potential use is under way.

Specifications:

Prime contractor	TRW
Platform / Bus	DSP
Mass at launch	2340 kg
Mass in orbit
Dimension	6.7 m dia x 10 m long (deployed)
Solar array
Stabilization	spin stabilized
DC power	1485 W
Design lifetime

Probably downlinks in S- and X-band. Has a wide field infrared telescope to provide real-time warning of missile launches (6000 infrared detectors)

End of life

Out of service	09 Apr 1999
Cause	The satellite was not delivered in the proper orbit. Reason unknown yet probably a failure of the IUS, built by Boeing.

Ref: #7, #14, #15, #78a - update: 15.01.05