DSCS 3-05

USA

Spacecraft n°:

US spacecraft n°:

Also called USA 78 (code B14) and DSCS-3 B14

Launch data:

Designation 21873 / 92006A
Launch date 11 Feb 1992
Launch site CC, LC-36B
Launch vehicle  Atlas-2 (AC-101)
Mission Military:Telecommunications
Geostationary orbit on:
Perigee / Apogee  km
Eccentricity 
Inclination  deg
Period  min

First satellite of the 3B generation. This generation is equipped with reinforced plating to resist to the explosion of an atomic bomb.

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: 16.11.08