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Communication, Ocean and Meteorological Satellite
Also called Chollian (means long distance view)


Designation 36744 / 10032A
Launch date 26 Jun 2010
Country of origin South Korea
Mission Telecommunications
Remote sensingmis_teledetection_res and Meteorology
Geostationary orbit 128.2°E
Launch vehicle Ariane V195

South Korean multi-purpose satellite owned by KARI. Program cost: $296 million.
Went inclined in June 2021.

sat-index articles

Technical data


Prime contractor EADS Astrium
Platform E3000
Mass at launch 2460 kg
Mass in orbit  
Dimension 2.8 x 1.8 x 2.9 m
Solar array 17.2 m span
Stabilization 3-axis
DC power EOL: 2500 W
Design lifetime 10 years

Meteorology payload

Multi-spectralscanning radiometer. 5 channels
one visible channel (1 km ground resolution)
four Infra-Red channels (4 km resolution)
HRIT & LRIT in S-band (receive) and L-band (transmit)

Remote Sensing payload

The Ocean Imager has a sophisticated focal plane providing for the first time ever, ocean data from geostationary orbit. Built by Astrium.
Eight imaging bands in the visible spectrum. Ground resolution over Korea is 400 m.

Communication payload

Will provide an internet-for-all public service. Onboard beam switching. Manufactured by KARI.


Main transponders
Backup transponders  
Bandwidth 100 MHz
Coverage South Korea
North Korea
Northeast China
EIRP max 58 dBW
G/T max 13 dB/K
Frequencies Uplink: 29.6-30 GHz
Downlink: 19.8-20.2 GHz

Experimental payload.

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