| 词条 | Thaicom 5 |
| 释义 |
| name = THAICOM 5 | image = | image_caption = | mission_type = Communication | operator = Thaicom | website = | COSPAR_ID = 2006-020B | SATCAT = | mission_duration = 12 years (planned) | spacecraft_bus = Spacebus 3000A | manufacturer = Alcatel Alenia Space | dry_mass = | launch_mass = {{convert|2800|kg}} | power = | launch_date = {{start-date|27 May 2006, 21:09|timezone=yes}} UTC | launch_rocket = Ariane 5ECA | launch_site = Kourou ELA-3 | launch_contractor = Arianespace | entered_service = | disposal_type = | deactivated = | orbit_epoch = {{date| 2006-05-27}}, 17:09:00 UTC[1] | orbit_reference = Geocentric | orbit_regime = Geostationary | orbit_periapsis = {{convert|35777|km|mi}} | orbit_apoapsis = {{convert|35796|km|mi}} | orbit_inclination = 0 degrees | orbit_period = 24 hours | orbit_longitude = 78.5° East | orbit_slot = | apsis = gee | trans_band = 25 C band 14 {{Ku band}} | trans_frequency = | trans_bandwidth = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = }}Thaicom 5 is a Thai geostationary communications satellite which is operated by Thaicom. It is used to provide communications services to Asia, Africa, Middle East, Americas, Europe and Australia.[2] OverviewThaicom 5 was constructed by Alcatel Alenia Space, and is based on the Spacebus 3000A satellite bus, with a configuration identical to the Thaicom 3 satellite which it replaced. It was originally ordered as Thaicom 4, but sold to Agrani as Agrani 2 before completion. It was completed in 1997, and stored until June 2005 when it was cancelled and sold back to Thaicom as Thaicom 5. It is equipped with 25 G/H band (IEEE C band) and 14 J band (IEEE Ku band) transponders, and at launch it had a mass of {{convert|2800|kg}}, with an expected operational lifespan of 12 years.[3][4] LaunchThe satellite was launched on an Ariane 5ECA carrier rocket, contracted by Arianespace, flying from ELA-3 at the Guiana Space Centre. The launch occurred at 21:09 UTC on 27 May 2006, and placed Thaicom 5, along with the Mexican Satmex 6 spacecraft, into geosynchronous transfer orbit.[5] At the time, this was the heaviest dual-satellite payload ever launched into geosynchronous transfer orbit,[6] however this record has since been broken. Following launch, THAICOM 5 raised itself into geostationary orbit using an S400 engine, with insertion occurring on 3 June 2006.[7] It underwent on-orbit testing, and was positioned at a longitude of 78.5° East for operational service, where it replaced the failing Thaicom 3 satellite.[2] On 2 October 2006, after Thaicom 5 had become operational, Thaicom 3 was moved to a graveyard orbit. See also{{Portal|Spaceflight}}
References1. ^{{Cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=2006-020B|title=NASA - NSSDCA - Spacecraft - Trajectory Details|website=nssdc.gsfc.nasa.gov|access-date=2018-05-02}} 2. ^1 {{cite web|url=http://www.thaicom.net/SAT_THCOM5.aspx|title=THAICOM 5|work=Satellites|publisher=Thaicom Public Company Limited|accessdate=2013-04-09|deadurl=yes|archiveurl=https://web.archive.org/web/20130521074504/http://www.thaicom.net/SAT_THCOM5.aspx|archivedate=2013-05-21|df=}} 3. ^{{cite web|url=http://www.ucsusa.org/nuclear_weapons_and_global_security/space_weapons/technical_issues/ucs-satellite-database.html|title=UCS Satellite Database|publisher=Union of Concerned Scientists|date=2009-07-01|accessdate=2009-08-08}} 4. ^{{cite web|url=http://space.skyrocket.de/doc_sdat/thaicom-3.htm|title=THAICOM 3, 5|first=Gunter|last=Krebs|publisher=Gunter's Space Page|accessdate=2009-08-08}} 5. ^{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|last=McDowell|first=Jonathan|publisher=Jonathan's Space Page|accessdate=2009-08-08}} 6. ^{{cite video|title=Launch Webcast|date=2006-05-27|publisher=Arianespace}} 7. ^{{cite web|url=http://planet4589.org/space/log/geo.date|title=Index|work=Geostationary Orbit Catalog|last=McDowell|first=Jonathan|publisher=Jonathan's Space Page|accessdate=2009-08-08}} External links
5 : Communications satellites in geostationary orbit|Thaicom satellites|Spacecraft launched in 2006|2006 in Thailand|Satellites using the Spacebus bus |
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