N-STAR a

Summary

N-STAR a
Mission typeCommunications
OperatorSKY Perfect JSAT Group
COSPAR ID1995-044A [1]
SATCAT no.23651
Mission duration10 years (planned)
Spacecraft properties
SpacecraftN-STAR a
BusSSL 1300
ManufacturerSpace Systems/Loral
Launch mass3,400 kg (7,500 lb) [2]
BOL mass2,050 kg (4,520 lb)
Dry mass1,617 kg (3,565 lb)
Start of mission
Launch date29 August 1995, 06:41:00 UTC [3]
RocketAriane 44P H10-3
Launch siteKourou, ELA-2
ContractorArianespace
Orbital parameters
Reference systemGeocentric orbit [4]
RegimeGeostationary orbit
Transponders
Band6 C-band
11 Ka-band
8 Ku-band
1 S-band [5]
Coverage areaJapan
 

N-STAR a, was a geostationary communications satellite originally ordered by a consortium including NTT DoCoMo and JSAT Corporation, and later fully acquired by JSAT, which was merged into SKY Perfect JSAT Group. It was designed and manufactured by Space Systems/Loral on the SSL 1300 platform.[2] It had a launch weight of 3,400 kg (7,500 lb), and a 10-year design life.[2] Its payload is composed of 6 C-band, 11 Ka-band, 8 Ku-band and 1 S-band transponders.

History

N-Star was created as a joint venture between JSAT, Nippon Telegraph and Telephone (NTT), NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service.[6] JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload.[7][8]

Two identical satellites were ordered on 1992 from Space Systems Loral, N-STAR a and N-STAR b, for 1995 and 1996 on orbit delivery.[9][10] They would be "switchboards in the sky" having S-band, C-band, Ka-band and Ku-band payload.[11]

N-STAR a was successfully launched aboard an Ariane 44P on 29 August 1995. Its twin, N-STAR b, launched on 5 February 1996, also aboard an Ariane 44P.[2][11] The satellite telephone service was operational in March 1996. In March 2000, the packet communications service was introduced.[12] In March 2000, JSAT received the NTT Communications interest in the N-STAR a and N-STAR b.[13][14]

In August 2003, the JSAT acquired the NTT DoCoMo interest on N-STAR a and N-STAR b, whom then leased them back.[15][16]

See also

  • JCSAT-5A – Also known as N-STAR d, was the follow on satellite.

References

  1. ^ "N-STAR-A". NASA. 27 April 2016. Retrieved 19 August 2016. This article incorporates text from this source, which is in the public domain.
  2. ^ a b c d Krebs, Gunter (19 August 2016). "N-Star a, b". Gunter's Space Page. Retrieved 20 July 2016.
  3. ^ "N-STAR-A". NASA. 27 April 2016. Retrieved 19 August 2016. This article incorporates text from this source, which is in the public domain.
  4. ^ "NSTAR A". N2YO.com. Retrieved 19 August 2016.
  5. ^ "Communications in Japan 1999" (PDF). General Planning and Policy Division, Minister's Secretariat (Whitepaper). Communications in Japan (1999 ed.). Ministry of Posts and Telecommunications of Japan. 1999: 132. Retrieved 20 August 2016. Cite journal requires |journal= (help)
  6. ^ "FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F" (PDF). NTT DoCoMo. 8 February 2002. Retrieved 2 August 2016.
  7. ^ "FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F" (PDF). NTT DoCoMo. 10 July 2002. Retrieved 2 August 2016.
  8. ^ "FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F" (PDF). NTT DoCoMo. 3 July 2003. Retrieved 2 August 2016.
  9. ^ "N-Star". Global Security. Retrieved 2 August 2016.
  10. ^ "Awards & Launch History - 1300 Bus Satellites". SSL (company). Archived from the original on 12 August 2015. Retrieved 20 August 2016.
  11. ^ a b "N-Star a and b". SSL (company). Retrieved 18 August 2016.
  12. ^ Yamamoto, Kazuichi; Furukawa, Makoto; Satoh, Hijin; Nishi, Yasuki; Kouji, Horikawa (September 2010). "Overview of WIDESTAR II Mobile Satellite Communications System and Service" (PDF). NTT DoCoMo Technical Journal. NTT DoCoMo. 12 (2): 37–42. Retrieved 2 August 2016.
  13. ^ "Who we are?". SKY Perfect JSAT. 3 August 2012. Retrieved 2 August 2016.
  14. ^ "History". SKY Perfect JSAT Holdings Inc. Retrieved 28 July 2016.
  15. ^ "NTT DoCoMo to Transfer Satellite Assets to JSAT and Acquire JSAT Common Stock". NTT DoCoMo. 31 July 2003. Retrieved 2 August 2016.
  16. ^ "FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F" (PDF). NTT DoCoMo. 28 June 2004. Retrieved 2 August 2016.

External links

  • JSAT Fleet Status