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JCSAT-4A

Names	JCSAT-6 (order to Feb 1999) JCSAT-4A (Feb 1999 onward)
Mission type	Communications
Operator	SKY Perfect JSAT Group
COSPAR ID	1999-006A
SATCAT no.	25630
Mission duration	14.5 years (planned) 25 years, 10 months and 16 days (elasped)
Spacecraft properties
Spacecraft	JCSAT-6
Spacecraft type	JCSAT
Bus	HS-601
Manufacturer	Hughes
Launch mass	2,900 kilograms (6,400 lb)
Start of mission
Launch date	16 February 1999, 01:45:26 UTC
Rocket	Atlas IIAS (AC-152)
Launch site	Cape Canaveral, LC-36A
Contractor	International Launch Services (ILS)
Orbital parameters
Reference system	Geocentric orbit
Regime	Geostationary orbit
Longitude	124° East
Transponders
Band	32 Ku band
Coverage area	Japan
JCSAT constellation← JCSAT-1BJCSAT-110 →

JCSAT-4A, designated JCSAT-6 before launch, is a Japanese geostationary communications satellite which is operated by JSAT Corporation (now SKY Perfect JSAT Group). It is positioned in geostationary orbit at a longitude of 124° East, from where it is used to provide broadcasting and corporate network communications to Japan.

Spacecraft description

JCSAT-6 was constructed by Hughes, based on the HS-601 satellite bus. It is equipped with 32 Ku-band transponders, and at launch it had a mass of 2,900 kg (6,400 lb), with an expected operational lifespan of fourteen and a half years.

Launch

It was launched atop an Atlas IIAS launch vehicle flying from Launch Complex 36A at the Cape Canaveral Air Force Station. The launch occurred at 01:45:26 UTC on 16 February 1999, and successfully placed JCSAT-6 into a geostationary transfer orbit. From this orbit, the satellite raised itself into a geostationary orbit using an R-4D apogee motor. The final burn to complete its insertion into geosynchronous orbit occurred on 1 March 1999.

See also

• 1999 in spaceflight

References

1. "JCSAT-4A". Sky Perfect JSAT. Archived from the original on 13 July 2009. Retrieved 8 August 2009.
2. "UCS Satellite Database". Union of Concerned Scientists. 1 July 2009. Retrieved 8 August 2009.
3. Krebs, Gunter. "JCSat 5, 6". Gunter's Space Page. Retrieved 8 August 2009.
4. McDowell, Jonathan (14 March 2021). "Launch Log". Jonathan's Space Report. Retrieved 20 March 2021.
5. Wade, Mark. "JCSAT". Encyclopedia Astronautica. Archived from the original on 29 August 2002. Retrieved 8 August 2009.
6. McDowell, Jonathan. "Index". Geostationary Orbit Catalog. Jonathan's Space Report. Archived from the original on 6 April 2010. Retrieved 8 August 2009.

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