Chollian

Chollian
Mission type Communication
Oceanography
Weather
Operator KARI
COSPAR ID 2010-032A
SATCAT № 36744
Mission duration 7 years
Spacecraft properties
Bus Eurostar-3000S
Manufacturer EADS Astrium
Launch mass 2,460 kilograms (5,420 lb)
Power 2.5 kilowatts
Start of mission
Launch date 26 June 2010, 21:41 (2010-06-26UTC21:41Z) UTC
Rocket Ariane 5ECA
Launch site Kourou ELA-3
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Geostationary
Longitude 128.2° East
Perigee 35,791 kilometres (22,239 mi)[1]
Apogee 35,795 kilometres (22,242 mi)[1]
Inclination 0.03 degrees[1]
Period 1436.13 minutes[1]
Epoch 23 January 2015, 17:05:20 UTC[1]

Chollian, (Korean, lit. Thousand Li View)[2] also known as Communication, Ocean and Meteorological Satellite 1[3] (COMS-1), is a South Korean satellite which was launched in June, 2010. It will be operated by the Korea Aerospace Research Institute, who will use it for communication, oceanography, and meteorological observation.

COMS-1 was constructed by EADS Astrium, and is based on the Eurostar-3000S satellite bus. It has a mass of 2,460 kilograms (5,420 lb), and carries transponders broadcasting in the D/E and K bands of the NATO-defined spectrum, or the L/S and Ka bands of the IEEE-defined spectrum respectively. Its single solar array is expected to generate a minimum of 2.5 kilowatts of power.[4]

COMS-1 was launched by Arianespace using an Ariane 5ECA carrier rocket lifting off from ELA-3 at the Guiana Space Centre in Kourou, French Guiana. The first attempt to launch it occurred on 23 June 2010, however the launch was scrubbed due to a problem with one of the rocket's subsystems.[5] A subsequent attempt on 24 June was also scrubbed, due to a problem with the pressurisation of the rocket's fuel tanks.[6] The launch occurred at 21:41 UTC on 26 June 2010.[6][7] The Saudi Arabian Arabsat-5A satellite was launched by the same rocket, with a SYLDA adaptor being used to separate the spacecraft. Arabsat-5A was mounted atop the SYLDA, with COMS-1 underneath it.[8]

Following launch, COMS-1 separated into a geosynchronous transfer orbit. It will use an apogee motor to raise itself into geosynchronous orbit. Once it reaches this orbit, it will undergo testing before beginning operations at a longitude of 128.2 degrees East.[9] Its mission is scheduled to last seven years,[4] however the satellite has a design life of ten years.[10]

References

  1. 1 2 3 4 5 "COMS 1 Satellite details 2010-032A NORAD 36744". N2YO. 23 January 2015. Retrieved 25 January 2015.
  2. McDowell, Jonathan (28 June 2010). "Issue 629". Jonathan's Space Report. Retrieved 29 June 2010.
  3. "Space Programs in Korea" (PDF). Asia Pacific Space Activity Forum. December 2006. p. 18. Retrieved 26 June 2010.
  4. 1 2 Krebs, Gunter. "COMS 1". Gunter's Space Page. Retrieved 26 June 2010.
  5. "Flight 195 – Arabsat-5A - COMS: Launch delayed". Arianespace. 23 June 2010. Retrieved 26 June 2010.
  6. 1 2 "Arianespace launch 195 – Arabsat-5A and COMS: Liftoff is set for Saturday, June 26, 2010". Arianespace. 26 June 2010. Retrieved 26 June 2010.
  7. http://www.arianespace.com/news-mission-update/2010/704.asp
  8. "Ariane 5 Does The Heavy Lifting For Arabsat-5A and COMS". Satnews Daily. 21 June 2010. Archived from the original on 16 July 2011. Retrieved 23 June 2010.
  9. "Satellite Launches for the Middle East and South Korea" (PDF). Arianespace. Retrieved 26 June 2010.
  10. "COMS". EADS Astrium. Retrieved 26 June 2010.
This article is issued from Wikipedia - version of the 11/23/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.