DSCS 3-04

USA

Spacecraft n°:

US spacecraft n°:

Also called USA 44 (code A2)

Launch data:

Designation 20203 / 89069B
Launch date 04 Sep 1989
Launch site CC, LC-40
Launch vehicle  Titan-34D /Transtage (#152)
Mission Military:Telecommunications
Geostationary orbit on:

Spacecraft data:

Prime contractor  Lockheed Martin (former GE Astro Space)
Platform  
Operator 
Mass at launch  2615 kg
Mass in orbit 1170 kg
Basic shape  
Dimension (m) 2.07 x 1.93 x 1.96m (LxWxD)
Solar array  11.4m
Stabilization  3 axis
DC power  BOL: 1240 W
EOL; 837 W
three 35 AH NiCd batteries
Telemetry S- and X-band
Beacon 7600.0 and 7604.7 MHz
Design lifetime  10 yrs


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
Ref: #15 - update: 03.11.08