- NigComSat-1
-
NigComSat-1 Operator NigComSat/Nigerian Communication Satellite Limited Major contractors CGWIC Bus DFH-4 Mission type Communication Satellite of Earth Launch date 13 May 2007, 16:01 GMT Carrier rocket Long March 3B Mission duration Planned: 15 years
Achieved: 18 monthsCOSPAR ID 2007-018A Homepage NigComSat Mass 5,150 kg Orbital elements Regime GSO Inclination 0.1° (1) Apoapsis 35,789 kilometres (22,238 mi) (1) Periapsis 35,782 kilometres (22,234 mi) (1) Orbital period 24 hours Longitude 42.5oE (1) References: 1[1] NigComSat-1 was a Nigerian communication satellite. The initial contract to build the satellite was signed in 2004. It became the first African geosynchronous communication satellite, when it was launched at 16:01 GMT on 13 May 2007, aboard a Chinese Long March 3B carrier rocket, from the Xichang Satellite Launch Centre in China. The spacecraft was operated by NigComSat Nigerian Communication Satellite Ltd. On November 11, 2008, NigComSat-1 failed in orbit after running out of power due to an anomaly in its solar array.
Contents
Launch
The satellite, which is the third Nigerian satellite to be placed into orbit, was launched into a geosynchronous transfer orbit and subsequently it was successfully inserted into a geosynchronous orbit, positioned at 42.5oE. It had a launch mass of 5,150 kg, and had an expected service life of 15 years.
Specifications
It was based on the Chinese DFH-4 satellite bus, and carries a variety of transponders:
- 4 C-band
- 14 Ku-band
- 8 Ka-band
- 2 L-band
It design was to provide coverage to many parts of Africa, and the Ka-band transponders would also cover Italy.
China's satellite export business
NigcomSat-1 represented a milestone for China’s satellite export business. For the first time the China Great Wall Industry Corporation provided all aspects of in-orbit delivery of a satellite to an international customer. This included satellite manufacture, launch services, ground station construction, project financing, insurance and training.[2]
Failure and replacement
On 10 November 2008 (0900 GMT), the satellite was reportedly switched off for analysis and to avoid a possible collision with other satellites. According to Nigerian Communications Satellite Limited, it was put into "emergency mode operation in order to effect mitigation and repairs".[3] The satellite eventually failed after losing power on 11 November 2008.
On March 24, 2009, the Nigerian Federal Ministry of Science and Technology, NigComSat Ltd. and CGWIC signed a further contract for the in-orbit delivery of the NigComSat-1R satellite. NigComSat-1R is also a DFH-4 satellite, and is expected to be delivered in the fourth quarter of 2011 as a replacement for the failed NigComSat-1.[4]
References
- ^ Encyclopedia Astronautica - CZ-3B
- ^ "CGWIC News". CGWIC. http://www.cgwic.com/news/index.html.
- ^ "'Technical problems' shut down Nigerian satellite". AFP. 2008-11-12. http://afp.google.com/article/ALeqM5g4S4e2LVeoER0jCP79S0gw3tjp7A.
- ^ http://www.cgwic.com/In-OrbitDelivery/CommunicationsSatellite/Program/NigComSat-1.html
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- Communications satellites in geosynchronous orbit
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