DSCS 3-06

USA

Spacecraft n°:

USA satellite n°:

Defense Satellite Communications System
Also called USA 82 and DSCS III B-12

Launch data:

Designation 22009 / 92037A
Launch date 02 Jul 1992 - 21:54:01 UT
Launch site CC, LC-36A
Launch vehicle  Atlas-2 (AC-103)
Mission Military: Communications
Geostationary orbit on:
Perigee / Apogee 35718 x 35855 km
Eccentricity 1,62E-03
Inclination 0.05 deg
Period 1436.1 min
Location 12,09 deg W

Spacecraft data:

Prime contractor  Lockheed Martin Missiles and Space
Platform  
Operator US Air Force
Mass at launch  1156 kg
Dry Mass 884 kg
Basic shape  
Dimension (m) 
Solar array  
Stabilization  
DC power  1240 W
Design lifetime  10 yrs - No more active end 2019


Features fixed (multiple-beam) antennas and a steerable high power antenna.

X-band:

Main transponders 6 
Backup two 40 W and two 10 W amplifiers
Power channels 1 & 2: 40 W (TWTA)
channels 3 to 6: 10 W (SSPA)
Coverage and EIRP max 2 Global beams: 29 dBW
2 Spot beams: 34 dBW
Gimballed dish: 44 dBW

Transponder frequency chart (GHz)

Channel Bandwidth (MHz) Frequency
1 50 ? 
2 75 ? 
3 85 ? 
4 85 ? 
5 60 ? 
6 50 ? 

Frequencies are probably in 250 MHz, S-band and X-band range. In X-band, uplink in the 7.9-8.025 GHz, 8.025-8.400 GHz, downlink in 7.250-7.750 GHz

Comments:

Super High Frequency (SHF) for U.S. government and military; sophisticated survivability enhancement; worldwide, longhaul coverage; X-band.
Ref.: #7, #15, #226 - update: 29.12.19 Home