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词条 N-STAR a
释义

  1. History

  2. See also

  3. References

  4. External links

{{Infobox spaceflight
| name = N-STAR a
| names_list =


| image =
| image_caption =
| image_alt =
| image_size =
| mission_type = Communication
| operator = SKY Perfect JSAT Group
| Harvard_designation =
| COSPAR_ID = 1995-044A[1]
| SATCAT = 23651
| website =
| mission_duration =
| spacecraft = N-STAR a
| spacecraft_type =
| spacecraft_bus = SSL 1300
| manufacturer = Space Systems/Loral
| launch_mass = {{convert|3400|kg|abbr=on}}[2]
| BOL_mass = {{convert|2050|kg|abbr=on}}
| landing_mass =
| dry_mass = {{convert|1617|kg|abbr=on}}
| payload_mass =
| dimensions =
| power =
| launch_date = {{start date|1995|08|29|06|41|00|7=Z}}[3]
| launch_rocket = Ariane 44P
| launch_site = Kourou ELA-2
| launch_contractor = Arianespace
| deployment_from =
| deployment_date =
| entered_service =
| disposal_type =
| deactivated =
| destroyed =
| last_contact =
| recovery_by =
| recovery_date =
| decay_date =
| landing_date =
| landing_site =


| orbit_reference = Geocentric
| orbit_regime = Inclined geosynchronous
| orbit_longitude =
| orbit_slot =
| orbit_semimajor = 42,458 km
| orbit_eccentricity =
| orbit_periapsis = 36,064 km
| orbit_apoapsis = 36,156 km
| orbit_inclination = 8.86°
| orbit_period = 1452.66 minutes
| orbit_RAAN =
| orbit_arg_periapsis =
| orbit_mean_anomaly =
| orbit_mean_motion =
| orbit_repeat =
| orbit_velocity =
| orbit_epoch = 2016-08-21 00:00:00 UTC[4]
| orbit_rev_number =
| apsis = gee
| trans_band = C band: 6
Ka band: 11
Ku band: 8
S band: 1[5]
| trans_frequency =
| trans_bandwidth =
| trans_capacity =
| trans_coverage =
| trans_TWTA =
| trans_EIRP =
| trans_HPBW =


| programme = N-Star
| previous_mission =
| next_mission = N-STAR b
| insignia =
| insignia_caption =
| insignia_alt =
| insignia_size =
}}

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 approximately {{convert|3400|kg|abbr=on}}, 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, NTT, NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service.[8] JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload.[9][10]

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.[12] They would be "switchboards in the sky" having S band, C band, Ka band and Ku band payload.[13]

N-STAR a was successfully launched aboard an Ariane 44P on August 29, 1995. Its twin, N-STAR b, launched on February 5, 1996, also aboard an Ariane 44P.[2][13] The satellite telephone service was operational in March 1996. On March 2000, the packet communications service was introduced.[16] On March 2000, JSAT received the NTT Communications interest in the N-STAR a and N-STAR b.[17][18]

On August 2003 the JSAT acquired the NTT DoCoMo interest on N-STAR a and N-STAR b, whom then leased them back.[19][20]

See also

{{Portal|Spaceflight}}
  • JCSAT-5A – Also known as N-STAR d, was the follow on satellite.

References

1. ^1 2 3 4 {{cite web |url=http://space.skyrocket.de/doc_sdat/nstar-a.htm |title=N-Star a, b |last1=Krebs |first1=Gunter Dirk |website=Gunter's Space Page |accessdate=20 July 2016 |date=2016-08-19}}
2. ^1 {{cite web |url=http://www.skyperfectjsat.co.jp/load_pdf.php?pTb=t_annual_&pRi=30&pJe=1 |title=Who we are |publisher=SKY Perfect JSAT Group |date=2012-08-03 |format=PDF |access-date=2016-08-02}}
3. ^1 {{cite web |url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1995-044A |title=N-STAR-A |publisher=NASA Space Science Data Coordinated Archive |date=27 April 2016 |access-date=2016-08-19}}
4. ^1 {{cite web |url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=1995-044A |title=N-STAR-A |publisher=NASA Space Science Data Coordinated Archive |date=27 April 2016 |access-date=2016-08-19}}
5. ^1 {{cite web |url=https://www.nttdocomo.co.jp/english/corporate/ir/binary/pdf/library/sec/backnumber/fy2000_e.pdf#page=30 |title=FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F |publisher=NTT DoCoMo |format=PDF |date=February 8, 2002 |access-date=2016-08-02}}
6. ^1 {{cite web |url=https://www.nttdocomo.co.jp/english/corporate/ir/binary/pdf/library/sec/backnumber/fy2001_e.pdf#page=30 |title=FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F |publisher=NTT DoCoMo |format=PDF |date=July 10, 2002 |access-date=2016-08-02}}
7. ^1 {{cite web |url=https://www.nttdocomo.co.jp/english/corporate/ir/binary/pdf/library/sec/backnumber/fy2002_e.pdf#page=34 |title=FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F |publisher=NTT DoCoMo |format=PDF |date=July 3, 2003 |access-date=2016-08-02}}
8. ^1 {{cite web |url=https://www.nttdocomo.co.jp/english/corporate/ir/binary/pdf/library/sec/backnumber/fy2003_e.pdf#page=33 |title=FORM 20-F/A AMENDMENT NO.1 TO FORM 20-F |publisher=NTT DoCoMo |format=PDF |date=June 28, 2004 |access-date=2016-08-02}}
9. ^1 {{cite web |url=https://www.nttdocomo.co.jp/english/info/media_center/pr/2003/000989.html |title=NTT DoCoMo to Transfer Satellite Assets to JSAT and Acquire JSAT Common Stock |publisher=NTT DoCoMo |date=July 31, 2003 |access-date=2016-08-02}}
10. ^1 {{cite Journal |last1=Yamamoto |first1=Kazuichi |last2=Furukawa |first2=Makoto |last3=Satoh |first3=Hijin |last4=Nishi |first4=Yasuki |last5=Kouji |first5=Horikawa |url=https://www.nttdocomo.co.jp/english/binary/pdf/corporate/technology/rd/technical_journal/bn/vol12_2/vol12_2_037en.pdf |title=Overview of WIDESTAR II Mobile Satellite Communications System and Service |journal=NTT DoCoMo Technical Journal |date=September 2010 |volume=12 |number=2 |pages=37-42 |accessdate=2 August 2016 |publisher=NTT DoCoMo |format=PDF}}
11. ^1 {{cite web |url=http://www.n2yo.com/satellite/?s=23651 |title=NSTAR A |publisher=n2yo.com |access-date=2016-08-19}}
12. ^1 {{cite web |url=http://www.sslmda.com/html/aboutssl/history_1300.html |title=Awards & Launch History - 1300 Bus Satellites |publisher=SSL |access-date=2016-08-20}}
13. ^1 2 {{cite web |url=http://www.sslmda.com/html/satexp/nstar.html |title=N-Star a and b |publisher=SSL |access-date=2016-08-18}}
14. ^1 {{cite journal |year=1999 |title=Communications in Japan 1999 |url=http://www.soumu.go.jp/main_sosiki/joho_tsusin/eng/Resources/WhitePaper/wp1999/10II-3.pdf |department=General Planning and Policy Division, Minister’s Secretariat |format=PDF |type=Whitepaper |series=Communications in Japan |edition=1999 |publisher=Ministry of Posts and Telecommunications of Japan |page=132 |access-date=2016-08-20}}
15. ^1 {{cite web |url=http://www.skyperfectjsat.co.jp/en/about/history.html |title=History |publisher=SKY Perfect JSAT Holdings Inc. |access-date=2016-07-28}}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]
}}

External links

  • JSAT Fleet Status
{{Orbital launches in 1995}}

5 : Communications satellites in geostationary orbit|Satellites using the SSL 1300 bus|Spacecraft launched in 1995|Communications satellites of Japan|Satellites of Japan
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