Launch & Graveyard Dates

SKYNET 4B

11/12/88

08/06/98

SKYNET 4A

31/12/89

20/06/05

SKYNET 4C 30/08/90
NATO IVA

07/01/91

23/08/07

NATO IVB 07/12/93
SKYNET 4D

09/01/98

28/01/08

SKYNET 4E 26/02/99
SKYNET 4F 07/02/01

System features

System features Skynet 4
S/C launch Mass ~1.5 tonnes
Power (EOL) ~1.5 kW

S/C Autonomy

wrt EOL
Nil
Designed Orbital positioning Geosynchronous - up to 4ยบ inclination
Design Life 7 Years
SHF Transponders

3 x 50W

(4 Channels)
SHF Antennas Global Horns plus 2x Movable (Zone) plus Special (anti jamming)
UHF Channels

2 x 25kHz

Stage1 s/c fixed

Stage2 s/c tuneable
UHF Antennas Single Tx / Rx antenna

Satellite Coverage Skynet 4 X-band

1-Current-Skynet-Constellation

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