cosmos.wikisort.org - Spacecraft

Chollian, (Korean: 천리안, lit. Thousand Li View, clairvoyance)[2] also known as Communication, Ocean and Meteorological Satellite 1[3] (COMS-1), was a South Korean satellite which was launched on 26 June 2010 and began operations on 1 April 2011. It was operated by the Korea Aerospace Research Institute, who used it for communication, oceanography, and meteorological observation.

Chollian

Mission type	Communication Oceanography Weather
Operator	KARI
COSPAR ID	2010-032A
SATCAT no.	36744
Mission duration	Planned: 7 years Final: 9 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 5 ECA
Launch site	Kourou ELA-3
Contractor	Arianespace
End of mission
Deactivated	31 March 2020, 23:59 (2020-04-01UTC00:00) UTC
Orbital parameters
Reference system	Geocentric
Regime	Geostationary
Longitude	128.2° East
Perigee altitude	35,791 kilometres (22,239 mi)[1]
Apogee altitude	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]

COMS-1 was constructed by EADS Astrium, and was based on the Eurostar-3000S satellite bus, bringing together lessons learned from Eurostar satellites and NASA-made GOES satellites respectively. It had a mass of 2,460 kilograms (5,420 lb), and carried 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 generated a minimum of 2.5 kilowatts of power.[4]

COMS-1 was launched by Arianespace using an Ariane 5 ECA carrier rocket lifting off from ELA-3 at the Guiana Space Centre in Kourou, French Guiana. The first launch attempt occurred on 23 June 2010; 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 used an apogee motor to raise itself into geosynchronous orbit. It then underwent testing before beginning operations at a longitude of 128.2 degrees East on 1 April 2011.[9][10] Its mission was scheduled to last seven years,[4] though the satellite had a design life of ten years.[11]

COMS-1 was deactivated on 31 March 2020, following a two-year extension of its seven-year primary mission.[9]

As follow-up satellites to Chollian-1, Chollian-2A and Chollian-2B were launched in December 2018 and in February 2020 respectively.[12]

References

На других языках

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[de] COMS 1

COMS 1 (Communication, Ocean and Meteorological Satellite) ist ein südkoreanischer Kommunikations-, Ozeanologie- und Meteorologiesatellit.

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- [en] Chollian

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