ASC 2

USA

Otherwise known as Spacenet 4

Launch data:

Designation	21227 / 91028A
Launch date	13 Apr 1991
Launch site	CC, LC-17B
Launch vehicle	Delta-7925 (#204)
Mission	Telecommunications
Geostationary orbit on:
Perigee / Apogee	km
Eccentricity
Inclination	deg
Period	min

[early 1998] Would have technical malfunctions in the Ku-band

Location

Begin	End	Position
L: 13 Apr 1991	Jan 2000	101°W
Feb 2000	Sep 2000	81°W
Nov 2000		172°E

After its relocation over the Pacific, the satellite provides trans-pacific communications. It covers Northern Pacific rim (Russia, Japan, Korea, part of China, Taiwan, The Philippines, part of Vietnam), Hawaii, Alaska, and the US & Canada West coast.

C-band

Main transponders	18
Backup transponders
Power	36 MHz: 12 of 8.5 W (SSPA) 72 MHz: 6 of 16 W (TWTA)
Bandwidth	12 of 36 MHz 6 of 72 MHz
Coverage
EIRP max	37 dBW
Polarization	linear

Ku-band

Main transponders	6
Backup transponders
Power	6 of 16.2 W (TWTA) 2 of 30 W (TWTA)
Bandwidth	72 MHz
Coverage
EIRP max	46 dBW
Polarization	linear H

Ref.: #15 - update: 12.11.08

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