Launch date
February 18, 2020
Launch vehicle
Ariane 5 ECA
Launch site
Spaceport, French Guiana (Guiana Space Center)
SKY Perfect JSAT Corporation, Korea Aerospace Research Institute (KARI)
Prime contractor(s)
Lockheed Martin Space, Korea Aerospace Research Institute (KARI)
Geostationary transfer orbit (GTO)


Arianespace at the service of SKY Perfect JSAT (Japan) and KARI (Korea) with JCSAT-17 and GEO-KOMPSAT-2B

For its third flight of 2020, Arianespace will orbit two telecommunications satellites using an Ariane 5 launch vehicle from the Guiana Space Center: JCSAT17 for the Japanese operator SKY Perfect JSAT Corporation; and GEOKOMPSAT-2B for Korea Aerospace Research Institute (KARI).

With this mission dedicated to space applications for telecommunications and environment monitoring, Arianespace once again contributes to the improvement of life on Earth.

Between 5:18 p.m. and 6:20 p.m. (Feb. 18)
Washington, D.C.
Between 7:18 p.m. and 8:20 p.m. (Feb. 18)
Kourou, French Guiana
Between 22:18 and 23:20 (Feb. 18)
Universal time (UTC)
Between 11:18 p.m. and 12:20 a.m. (Feb. 18/19)
Paris, France
Between 07:18 a.m. and 08:20 a.m. (Feb. 19)
Between 07:18 a.m. and 08:20 a.m. (Feb. 19)



Since the launch of JCSAT-1 in 1989, SKY Perfect JSAT Corporation and Arianespace have developed a strong relationship of mutual trust.

JCSAT-17 will be the 21st SKY Perfect JSAT satellite to be launched by Arianespace. This geostationary communications satellite will deliver flexible, high-bandwidth communications to users in Japan and the surrounding region.

JCSAT-17 payloads incorporates S-band, C-band and Ku-band transponders, which will provide satellite communication services. The S-band and C-band transponders will serve NTT DOCOMO, Inc., the largest telecommunications company in Japan, for its flexible mobile communications services in Japan and the surrounding region under IRU contract (Indefeasible Right of Use). SKY Perfect JSAT will support NTT DOCOMO’s satellite communication services.

SKY Perfect JSAT Corporation is a leader in the converging fields of broadcasting and communications. It is a provider of both multi-channel pay TV broadcasting and satellite communications services and delivers a broad range of entertainment through the SKY PerfecTV! platform – the most extensive in Japan.

Arianespace has been present in Japan for more than 30 years, with the opening of an office in Tokyo in 1986. The relationship of trust forged with Japanese operators and public authorities has enabled the company to win 34 of the 47 launch contracts open to competition.

Since 1989, Arianespace has launched an average of one Japanese satellite per year.

JCSAT-17 will also be the 32nd satellite launched by Arianespace for Japan. Built by Lockheed Martin Space, JCSAT-17 will be the 47th satellite made by this manufacturer to be launched by Arianespace.


GEO-KOMPSAT-2B will be KARI’s second satellite as a manufacturer – and its third as a client – to be launched by Arianespace.

The GEO-KOMPSAT-2 program is a national program of the Korean government to develop and operate two civilian geostationary satellites: GEO-KOMPSAT-2A for meteorological and space weather monitoring missions; and GEO-KOMPSAT-2B for Earth environment monitoring and ocean monitoring missions.

The GEO-KOMPSAT 2 program also ensures the succession for the COMS program (Communication, Ocean and Meteorological Satellite).

The predecessor satellite, GEO-KOMPSAT-2A, was successfully launched by Arianespace in December 2018.

GEO-KOMPSAT-2B carries two main payloads: GOCI II (Geostationary Ocean Color Imager II), provided by Airbus Defence and Space; and the GEMS (Geostationary Environment Monitoring Spectrometer), provided by Ball Aerospace & Technologies.

For nearly 30 years, Arianespace and Korea’s satellite technology research centers have developed a sound relationship, with the launch of both scientific microsatellites and the COMS multi-mission satellite.

Arianespace also maintains a fruitful collaboration in terms of commercial telecommunications with the national satellite operator.

In parallel, Arianespace developed a unique partnership with Korean industry. During the 1990s, Korea delivered 22 telemetry boxes for Ariane 5, thus becoming the only non-European partner involved in the Ariane program.

GEO-KOMPSAT-2B will be the eighth satellite launched by Arianespace for South Korea.

Currently, there is one additional KARI satellite in Arianespace’s backlog for a future launch.

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