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词条 HS-333
释义

  1. Design

  2. Satellites

  3. References

  4. See also

{{refimprove|date=December 2008}}

In 1970, Hughes Aircraft Company (HAC) Space and Communications Group offered the first{{citation needed|date=July 2012}} standardized satellite: the HS 333 design. A spinning satellite, it was based on previous one-design satellites like Intelsat I. HAC built eight of these 300 watt, 12 channel single antenna satellites between 1970 and 1977.[1]

Design

The early satellites were designed with cylindrical bodies to maximize the size of the satellite that could fit inside of the rocket's nose cone or fairing which was also round. The early design satellites also relied on spinning at about 30 rpm for stability in orbit. The spinning satellite is a gyroscope.

Several parallel decks, including the top and bottom, were used to mount the propulsion, attitude control, communication, Telemetry & Command (T&C), and power equipment. The upper deck or top of the satellite contained the payload antenna and the T&C antenna.

The outer surface of the cylindrical body was covered with solar cells to generate power for operating the satellite's electrical equipment. Batteries provide power during eclipse, when the satellite is in the shadow of the earth. The batteries are recharged by excess power from the solar array.

The HS 333 was 1.8 m (6 ft) in diameter and nominally 3.3 m (11 ft) high. The solar array and batteries provided sufficient power over the satellites 7 year design life to power the 190 W payload and 233 W spacecraft equipment. The payload contributed 54 kg (119 lb) of the HS 333's 146 kg (542 lb) dry mass.

Satellites

Eight HS-333 satellites were launched:

SatelliteOperatorLaunch date
(UTC)		Carrier rocket[2]MassLongitudeRetirementRemarks
Anik A1[2]CAN}} Telesat Canada[3]10 November 1972}}
01:14:03[4]		Delta 1914[3]560|kg}}[3]
Anik A2[2]CAN}} Telesat Canada[3]20 April 1973}}
23:47:03[4]		Delta 1914[3]560|kg}}[3]
Westar 1[2]USA}} Western Union[5]13 April 1974}}
23:33:03[4]		Delta 2914[5]574|kg}}[5]
Westar 2[2]USA}} Western Union[5]10 October 1974}}
23:53:00[4]		Delta 2914[5]574|kg}}[5]
Anik A3[2]CAN}} Telesat Canada[3]7 May 1975}}
23:35:26[4]		Delta 2914[3]560|kg}}[3]
Palapa A1[2]IDN}} Perumtel[6]8 July 1976}}
23:31[4]		Delta 2914[6]574|kg}}[6]
Palapa A2[2]IDN}} Perumtel[6]10 March 1977}}
23:16[4]		Delta 2914[6]574|kg}}[6]
Westar 3[2]USA}} Western Union[5]20 August 1979}}
00:20[4]		Delta 2914[5]574|kg}}[5]

References

1. ^Hughes Aircraft Corporation, Space and Communications Group, SBS F6 Prime sales brochure, 1985
2. ^1 2 3 4 5 6 7 {{cite web|url=http://space.skyrocket.de/doc_sat/hs-333-356.htm|title=Hughes: HS-333 / HS-356|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=4 July 2012}}
3. ^1 2 3 4 5 6 7 8 {{cite web|url=http://space.skyrocket.de/doc_sdat/anik-a.htm|title=Anik A 1, 2, 3|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=4 July 2012}}
4. ^1 2 3 4 5 6 7 8 {{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|accessdate=4 July 2012}}
5. ^1 2 3 4 5 6 7 8 {{cite web|url=http://space.skyrocket.de/doc_sdat/westar-1.htm|title=Westar 1, 2, 3|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=4 July 2012}}
6. ^1 2 3 4 5 {{cite web|url=http://space.skyrocket.de/doc_sdat/palapa-a.htm|title=Palapa A 1, 2|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=4 July 2012}}

See also

  • Comparison of satellite buses
{{Hughes satellites}}

1 : Satellite buses
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