| SN4 Satellite Specifications |
Orbital Location: 101? West Longitude
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| C-band Transponders |
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Ku-band Transponders |
| Coverage: 50-state, Caribbean |
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Coverage: CONUS |
Narrowband C:
12 Transponders @ 36 MHz
RF Power: 8.5 watts
Amp Type: Solid State
Amp Redundancy: 2 banks of 7-for-6
Wideband C:
6 Transponders @ 72 MHz
RF Power: 16 wattss
Amp Type: Traveling Wave Tube
Amp Redundancy: 2 banks of 7-for-6
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6 Transponders @ 72 MHz |
Variable uplink sensitivity
Receiver Redundancy: 4-for-2 |
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RF Power: 4 @ 16 watts, 2 @ 30 watts
Variable uplink sensitivity
Amp Type: Traveling Wave Tube
Amp Redundancy: 7-for-6
Receiver Redundancy: 2-for-1 |
| Beacon Info: 3701.5 H, 4197.5 V |
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Launch Date: April 12, 1991
Launch Mass: 1195 kg (2635 lbs)
Launch Vehicle: Delta 7925
Length: 46 feet (arrays deployed)
Expected Lifetime: over 12 years |
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