Apstar 7

Apstar-7 is a Chinese communications satellite which is operated by APT Satellite as part of the Apstar system. It was launched in 2012 as a replacement for the Apstar 2R satellite launched in 1997.[3]

Apstar 7
Mission typeCommunication
OperatorAPT Satellite
COSPAR ID2012-013A
SATCAT no.38107
Websitewww.apstar.com/en/apstar-fleet/apstar-7/
Mission duration15 years[1]
Spacecraft properties
BusSpacebus-4000C2
ManufacturerThales Alenia Space
Launch mass5,054 kilograms (11,142 lb)[1]
Start of mission
Launch date31 March 2012, 10:27 (2012-03-31UTC10:27Z) UTC
RocketChang Zheng 3B/E
Launch siteXichang LC-2
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Longitude76.5° East[1]
Perigee altitude35,784 kilometres (22,235 mi)
Apogee altitude35,802 kilometres (22,246 mi)
Inclination0.04 degrees
Period23.93 hours
Epoch19 December 2013, 16:37:15 UTC[2]
 

Apstar-7 was constructed by Thales Alenia Space, and is based on the Spacebus-4000C2 satellite bus. The satellite had a mass at launch of 5,054 kilograms (11,142 lb), and is expected to operate for at least 15 years.[1] It is positioned in geostationary orbit at a longitude of 76.5 degrees East, and carries 56 transponders with an operating power of 8.4 kilowatts;[1] 28 operating in the C band and providing services to Asia, Africa, eastern and central Europe and Australia and the other 28 operating in the Ku band, covering Africa, the Middle East, the People's Republic of China, and Taiwan.[4] The satellite's solar arrays generate 11.4 kilowatts of power.

Apstar-7 was launched by a Long March 3B/E carrier rocket, flying from Launch Complex 2 at the Xichang Satellite Launch Centre. Liftoff took place at 10:27 UTC on 31 March 2012, with the rocket placing the satellite into a supersynchronous transfer orbit.[5]

Operational history

Thales Alenia Space built Apstar-7 as an ITAR-free satellite, containing no restricted American components.[6] The United States prohibits the export of satellite components when a Chinese launcher will be used. Ironically, the US Department of Defense leased bandwidth on Apstar-7 in May 2012 to improve communications with the U.S. Africa Command.[7] In 2013, Thales Alenia was forced to discontinue its ITAR-free satellite line after US supplier Aeroflex admitted that it had sold them ITAR-controlled components.[8]

gollark: Sometimes the network is happily able to transfer several MB/s (which is not great but good enough for gaming and such) but sometimes I just get horrible packet loss for no reason.
gollark: Can't.
gollark: Sometimes I hate wireless networking.
gollark: Oh hey, we can make *screens* now.
gollark: I suppose that this is a valid alternative to a storage scanner now we have enderpearls.

See also

References
  1. Krebs, Gunter. "APStar 7, 7B". Gunter's Space Page. Retrieved 4 May 2012.
  2. "APSTAR 7 Satellite details 2012-013A NORAD 38107". N2YO. 19 December 2013. Retrieved 20 December 2013.
  3. Barbosa, Rui C. (31 March 2012). "Chinese Long March 3B/E launches Apstar-7". NASASpaceflight.com. Retrieved 4 May 2012.
  4. "APSTAR-7 system characteristics". APT Satellite Holdings. Archived from the original on 5 May 2012. Retrieved 4 May 2012.
  5. McDowell, Jonathan (12 April 2012). "Issue 656". Jonathan's Space Report. Archived from the original on 6 December 2012. Retrieved 4 May 2012.
  6. Clark, Stephen (31 March 2012). "Chinese rocket lifts off with communications satellite". Spaceflight Now.
  7. Capaccio, Tony (29 April 2013). "Pentagon Using China Satellite for U.S.-Africa Command". Bloomberg. Retrieved 29 April 2013.
  8. Ferster, Warren (5 September 2013). "U.S. Satellite Component Maker Fined $8 Million for ITAR Violations". SpaceNews.

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