| 词条 | Intelsat 27 |
| 释义 |
| name = Intelsat 27 | image = WGS 1.jpg | image_caption = Intelsat 27, built on the basis of the Boeing 702. | mission_type = Communications | operator = Intelsat | website = | mission_duration = 15 years (planned) 40 seconds (achieved) Failed to orbit | spacecraft_bus = BSS-702MP | manufacturer = Boeing | dry_mass = | launch_mass = {{convert|6241|kg|lb|abbr=on}} | power = | launch_date = {{start-date|1 February 2013, 06:56|timezone=yes}} UTC | launch_rocket = Zenit-3SL | launch_site = Odyssey, Pacific Ocean | launch_contractor = Sea Launch | orbit_epoch = Planned | orbit_reference = Geocentric | orbit_regime = Geostationary | orbit_periapsis = | orbit_apoapsis = | orbit_inclination = | orbit_period = | orbit_longitude = 55.5° West | apsis = gee | trans_band = | trans_frequency = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = | programme = Intelsat | previous_mission = Intelsat 26 | next_mission = Intelsat 28 }}Intelsat 27 was an American communications satellite which was to have been operated by Intelsat. Intended as a replacement for Intelsat 805, it was destroyed after the rocket carrying it to orbit fell into the Pacific Ocean 56 seconds after launch.[1] DesignBased on the Boeing 702MP satellite bus, Intelsat 27 was designed to provide fifteen or more years of service to Intelsat customers in North America, South America, the Atlantic Ocean region and Europe. The spacecraft had a mass of {{convert|6241|kg}}, and was equipped with 20 C band and 20 {{Ku band}} transponders for commercial users, as well as 20 UHF transponders for military use.[2][3] Originally intended for the United States Navy, the UHF payload was to have been leased to the government of Italy following the US Department of Defense withdrawing.[2] The satellite would have been positioned at 55.5° West in geostationary orbit, co-located with Intelsat 805 and Galaxy 11.[4] LaunchSea Launch were contracted to launch Intelsat 27, using a Zenit-3SL carrier rocket flying from the Odyssey platform anchored in the Pacific Ocean. The rocket lifted off from Odyssey at 06:56 UTC on February 1, 2013, however shortly afterwards Sea Launch issued a statement that the launch failed "approximately 40 seconds after liftoff",[3] during first stage flight.[5] Initial indications are that the rocket's first stage engine was intentionally shut down after the vehicle went out of control. Intelsat stated that they were "clearly disappointed with the outcome of the launch".[6]Sea Launch's Failure Review Oversight Board (FROB) found that the problem was in the hydraulic power supply unit in the Zenit-3SL's first stage.[7] See also{{Portal|Spaceflight}}
References1. ^Zenit fails in Sea Launch accident {{Intelsat}}{{Orbital launches in 2013}}{{US-spacecraft-stub}}2. ^1 {{cite web|url=http://space.skyrocket.de/doc_sdat/intelsat-27.htm|title=Intelsat 27|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=1 February 2012}} 3. ^1 {{cite web|url=http://www.sea-launch.com/news-q11348-Sea_Launch_Experiences_a_Launch_Failure_on_Intelsat_27_Mission.aspx |title=Sea Launch Experiences a Launch Failure on Intelsat 27 Mission |website=sea-launch.com |accessdate=5 February 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20130205054638/http://www.sea-launch.com/news-q11348-Sea_Launch_Experiences_a_Launch_Failure_on_Intelsat_27_Mission.aspx |archivedate=February 5, 2013 }} 4. ^{{cite web |url=http://www.intelsat.com/_files/resources/satellites/IS-27-factsheet.pdf |title=Intelsat 27 Fact Sheet |publisher=Intelsat}} 5. ^{{cite web|url=http://www.nasaspaceflight.com/2013/02/sea-launch-zenit-3sl-launch-intelsat-27/|title=Sea Launch Zenit 3SL with Intelsat 27 fails during first stage flight|first=Chris|last=Bergin|publisher=NASASpaceflight.com|date=1 February 2013|accessdate=1 February 2013}} 6. ^{{cite web|url=http://blog.intelsat.com/2013/02/intelsat-27-launch-unsuccessful_1.html|title=Intelsat 27 Launch Unsuccessful|publisher=Intelsat|work=Intelsat Blog|date=1 February 2013|accessdate=1 February 2013}} 7. ^{{cite web|url=http://www.sea-launch.com/missions-q11349-Failure_Review_Oversight_Board.aspx|title=Failure Review Oversight Board|publisher=Sea Launch|accessdate=8 May 2013}} 4 : Satellites using the BSS-702 bus|Spacecraft launched in 2013|Intelsat satellites|Satellite launch failures |
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