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AsiaSat 3S

Second-Generation Spacecraft for AsiaSat

AsiaSat 3S satellite animation (Neg#: 95-15223)

Customer Asia Satellite
Telecommunications Co. Ltd.
Hong Kong, China
Spacecraft Hughes 601HP
Launch
   Date
   Vehicle
   Site
21 March 1999
Proton
Baikonur, Kazakhstan
Orbital Slot 105.5° E Longitude
Contract life 15 years

In March, 1998, AsiaSat ordered AsiaSat 3S, a Hughes 601HP satellite, to provide television distribution and telecommunications services throughout Asia, the Middle East, Australasia, and the Commonwealth of Independent States, with multiple spot beams for selected areas. The contract also included ground station upgrades.

AsiaSat 3S generates up to 9,900 watts using two sun-tracking four-panel solar wings covered with dual-junction gallium arsenide solar cells. Two 107-inch Gregorian shaped-surface antennas are used. The C-band antenna is mounted on the east side of the satellite to provide broad-area coverage of Asia and Australasia. The other antenna, operating in Ku-band and providing focused-area coverage of East Asia, is mounted on the west side.

C-band Beam

Ku-band East Asia Beam

Ku-band South Asia Beam

Coverage Areas Courtesy of AsiaSat

Artist rendering of Apstar 3 satellite shown stowed and deployed.
Stowed (left); In Orbit (right)
Focused-area coverage of South Asia is provided by a 50-inch-diameter, dual-gridded shaped reflector operating in Ku-band. A 40-inch-diameter Ku-band steerable spot beam antenna provides the spacecraft the ability to direct 5-degree coverage of any area on the Earth's surface visible to AsiaSat 3S from its orbital location. Both of these antennas are mounted on the nadir side of the spacecraft.

AsiaSat 3S is the second spacecraft Hughes built for AsiaSat. The first, AsiaSat 1, an HS 376 spin-stabilized spacecraft, was launched in 1990. AsiaSat 3S is being controlled from an integrated satellite control facility, built by Hughes and located in Hong Kong. In October 2000, Hughes Space and Communications Company became Boeing Satellite Systems, Inc.

ASIASAT 3S SPECIFICATIONS

POWER
Solar
   Beginning of life
   Panels
9.9 kw
2 wings, each w/4 panels
of dual-junction gallium
arsenide solar cells
Batteries 30-cell NiH, 350-Ahr
PAYLOAD
C-band 28 active
55-w TWTAs
Ku-band 16 active
140-w TWTAs
PROPULSION
Liquid apogee motor 110 lbf (490 N)
Stationkeeping thrusters
   (bipropellant)
12 x 5 lbf (22 N)
DIMENSIONS
In orbit L, solar arrays: 86 ft (26.2 m)
W, antennas: 32 ft 9 in (10 m)
Stowed H: 19 ft (5.8 m)
W: 11 ft 1 in x 11 ft 5 in
(3.4 m x 3.5 m)
Mass
   Launch
   In orbit
   (beginning of life)
7640 lb (3465 kg)
5512 lb (2500 kg)

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P.O. Box 92919 (S10/S323)
Los Angeles, CA 90009
USA
(310) 364-6363

www.boeing.com/satellite
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