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| SATCAT = 25630
| SATCAT = 25630
| website =
| website =
| mission_duration = 14.5 years (planned)
| mission_duration = 14.5 years (planned) <br/> {{time interval|February 16, 1999 01:45:26}} (elasped)


| spacecraft = JCSAT-6
| spacecraft = JCSAT-6
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| trans_bandwidth =
| trans_bandwidth =
| trans_capacity =
| trans_capacity =
| trans_coverage = [[Japan]]
| trans_coverage = Japan
| trans_TWTA =
| trans_TWTA =


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}}
'''JCSAT-4A''', designated '''JCSAT-6''' before launch, is a Japanese geostationary [[communications satellite]] which is operated by [[JSAT Corporation]] (now [[SKY Perfect JSAT|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]].<ref>{{cite web |url=http://www.sptvjsat.com/en/business/satellite/list/jcsat_4a.html|title=JCSAT-4A|publisher=Sky Perfect JSAT|access-date=2009-08-08|url-status=dead|archive-url=https://web.archive.org/web/20090713034304/http://www.sptvjsat.com/en/business/satellite/list/jcsat_4a.html|archive-date=2009-07-13}}</ref>
'''JCSAT-4A''', designated '''JCSAT-6''' before launch, is a Japanese geostationary [[communications satellite]] which is operated by [[JSAT Corporation]] (now [[SKY Perfect JSAT|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.<ref>{{cite web |url=http://www.sptvjsat.com/en/business/satellite/list/jcsat_4a.html|title=JCSAT-4A|publisher=Sky Perfect JSAT|access-date=2009-08-08|url-status=dead|archive-url=https://web.archive.org/web/20090713034304/http://www.sptvjsat.com/en/business/satellite/list/jcsat_4a.html|archive-date=2009-07-13}}</ref>


== Spacecraft description ==
== Spacecraft description ==
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== Launch ==
== Launch ==
It was launched atop an [[Atlas II|Atlas IIAS]] [[launch vehicle]] flying from [[Cape Canaveral Launch Complex 36|Launch Complex 36A]] at the [[Cape Canaveral Space Force Station|Cape Canaveral Air Force Station]]. The launch occurred at 01:45:26 [[Coordinated Universal Time|UTC]] on 16 February 1999,<ref name="JSR-LL">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|last=McDowell |first=Jonathan|publisher=Jonathan's Space Report|date=14 March 2021|access-date=20 March 2021}}</ref> 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 kick motor|apogee motor]].<ref name="EA">{{cite web|url=http://www.astronautix.com/project/jcsat.htm|title=JCSAT|publisher=Encyclopedia Astronautica|last=Wade |first=Mark|access-date=2009-08-08}}</ref> The final burn to complete its insertion into geosynchronous orbit occurred on 1 March 1999.<ref name="GSOHist">{{cite web |url=http://planet4589.org/space/log/geo.date|title=Index|work=Geostationary Orbit Catalog|last=McDowell|first=Jonathan|publisher=Jonathan's Space Report|access-date=2009-08-08|archive-url=https://web.archive.org/web/20100406015538/http://www.planet4589.org/space/log/geo.date|archive-date=2010-04-06|url-status=dead}}</ref>
It was launched atop an [[Atlas II|Atlas IIAS]] [[launch vehicle]] flying from [[Cape Canaveral Launch Complex 36|Launch Complex 36A]] at the [[Cape Canaveral Space Force Station|Cape Canaveral Air Force Station]]. The launch occurred at 01:45:26 [[Coordinated Universal Time|UTC]] on 16 February 1999,<ref name="JSR-LL">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|last=McDowell |first=Jonathan|publisher=Jonathan's Space Report|date=14 March 2021|access-date=20 March 2021}}</ref> 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 kick motor|apogee motor]].<ref name="EA">{{cite web|url=http://www.astronautix.com/project/jcsat.htm|archive-url=https://web.archive.org/web/20020829020459/http://astronautix.com/project/jcsat.htm|url-status=dead|archive-date=29 August 2002|title=JCSAT|publisher=Encyclopedia Astronautica|last=Wade |first=Mark|access-date=2009-08-08}}</ref> The final burn to complete its insertion into geosynchronous orbit occurred on 1 March 1999.<ref name="GSOHist">{{cite web |url=http://planet4589.org/space/log/geo.date|title=Index|work=Geostationary Orbit Catalog|last=McDowell|first=Jonathan|publisher=Jonathan's Space Report|access-date=2009-08-08|archive-url=https://web.archive.org/web/20100406015538/http://www.planet4589.org/space/log/geo.date|archive-date=2010-04-06|url-status=dead}}</ref>


== See also ==
== See also ==

Latest revision as of 23:24, 25 January 2023

JCSAT-4A
NamesJCSAT-6 (order to Feb 1999)
JCSAT-4A (Feb 1999 onward)
Mission typeCommunications
OperatorSKY Perfect JSAT Group
COSPAR ID1999-006A Edit this at Wikidata
SATCAT no.25630
Mission duration14.5 years (planned)
25 years, 3 months and 2 days (elasped)
Spacecraft properties
SpacecraftJCSAT-6
Spacecraft typeJCSAT
BusHS-601
ManufacturerHughes
Launch mass2,900 kilograms (6,400 lb)
Start of mission
Launch date16 February 1999, 01:45:26 UTC
RocketAtlas IIAS (AC-152)
Launch siteCape Canaveral, LC-36A
ContractorInternational Launch Services (ILS)
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
Longitude124° East
Transponders
Band32 Ku band
Coverage areaJapan
 

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.[1]

Spacecraft description[edit]

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.[2][3]

Launch[edit]

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,[4] 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.[5] The final burn to complete its insertion into geosynchronous orbit occurred on 1 March 1999.[6]

See also[edit]

References[edit]

  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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