| 词条 | BSAT-3a |
| 释义 |
| name = BSAT-3a | names_list = | image = | image_caption = | image_alt = | image_size = | mission_type = Communication | operator = B-SAT | Harvard_designation = | COSPAR_ID = 2007-036B[1] | SATCAT = 32019 | website = B-SAT Satellite Fleet | mission_duration = | spacecraft = BSAT-3a | spacecraft_type = | spacecraft_bus = A2100[2] | manufacturer = Lockheed Martin | launch_mass = {{convert|1980|kg|abbr=on}} | BOL_mass = | landing_mass = | dry_mass = {{convert|927|kg|abbr=on}}[2] | payload_mass = | dimensions = {{convert|3.8|x|1.9|x|1.9|m|abbr=on}}[4] | power = 2.8 kW[4] | launch_date = {{start date|2007|08|14|23|44|7=Z}}[1] | launch_rocket = Ariane 5 ECA VA-177 | launch_site = Guiana Space Center ELA-3 | 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 =
| programme = B-SAT | previous_mission = BSAT-2c | next_mission = BSAT-3b | insignia = | insignia_caption = | insignia_alt = | insignia_size = }}BSAT-3a, is a geostationary communications satellite operated by B-SAT which was designed and manufactured by Lockheed Martin on the A2100 platform. It is stationed on the 110° East orbital slot along its companion BSAT-3b and BSAT-3c from where they provide redundant high definition direct television broadcastin across Japan.[2][8][9] Satellite descriptionBSAT-3a was designed and manufactured by Lockheed Martin on the A2100 satellite bus for B-SAT. It had a launch mass of {{convert|1980|kg|abbr=on}}, a dry mass of {{convert|927|kg|abbr=on}}, and a 13-year design life.[4] As most satellites based on the A2100 platform, it uses a {{convert|460|N|abbr=on}} LEROS-1C LAE for orbit raising.[8]It measured {{convert|3.8|x|1.9|x|1.9|m|abbr=on}} when stowed for launch. Its dual wing solar panels can generate 2.8 kW of power at the end of its design life, and span {{convert|14.65|m|abbr=on}} when fully deployed.[4] It has a single Ku band payload with 8 active transponders plus four spares with a TWTA output power of 130 Watts.[2] HistoryOn April 27, 2005, Lockheed Martin announced that it had been granted by B-SAT an authorization to proceed to the construction of its first third generation broadcasting satellite, BSAT-3a.[14] On May 18, 2005, both companies announced the signature of the definitive contract for the satellite. It would be based on the A2100 platform, sport eight 130Watts Ku band transponders (plus 4 spares), have a design life of 13 years and have a 1.8 kW power generation capability. It was expected launch in the second quarter of 2007 to be co-located at the 110° East orbital position.[15] On June 15, 2005, Arianespace announced that it had been awarded the launch contract for BSAT-3a.[16] On June 19, 2007 Lockheed announced that it was poised to deliver BSAT-3a on the third quarter of 2007, along another Japanese spacecraft, JCSAT-11. BSAT-3a was the sixth broadcasting satellite procured by B-SAT.[17] On August 10, 2007, Lockheed announced that BSAT-3a was mated to the launcher and ready for its ride to orbit.[18] It launched at 23:44 UTC, of August 14, 2007 aboard an Ariane 5 ECA from Guiana Space Center ELA-3 launch pad.[1] It rode on the lower berth under the SYLDA along Spaceway-3. The first signals from the satellite were received one hour later, at 00:46 UTC August 15, 2007. It also marked the 33rd launch of the A2100 platform.[21] It was entered into service on October 1, 2007 after successfully passing the on-orbit deployment and checkout phase.[2][23] References1. ^1 2 3 4 {{cite web |url=http://www.arianespace.com/site/news/kit/SPACEWAY3_BSAT3a_GB.pdf |archive-url=https://web.archive.org/web/20070927022841/http://www.arianespace.com/site/news/kit/SPACEWAY3_BSAT3a_GB.pdf |archive-date=2007-09-27 |title=Launch Kit V-177 |publisher=Arianespace |format=PDF |date=August 7, 2007 |access-date=2016-09-06}} [1][2][3][4][5][6][7][8][9][10][11][12]2. ^1 {{cite web|url=http://www.defense-aerospace.com/articles-view/release/3/58804/ariane-to-launch-japan's-bsat3a-satellite-(jun-16).html |title=Arianespace Will Launch BSAT-3A for Japan |website=defense-aerospace.com |archive-url=https://web.archive.org/web/20160906151558/http://www.defense-aerospace.com/articles-view/release/3/58804/ariane-to-launch-japan%27s-bsat3a-satellite-%28jun-16%29.html |archive-date=2016-09-06 |date=Jun 15, 2005 |publisher=Arianespace |access-date=2016-09-06 |deadurl=yes }} 3. ^1 2 3 4 5 {{cite web |url=http://www.b-sat.co.jp/broadcasting-satellite/#popup |title=放送衛星3機のスペック |trans-title=Specifications of the three broadcasting satellites |publisher=Broadcasting Satellite System Corporation |access-date=2016-09-06}} 4. ^1 2 {{cite web |url=http://space.skyrocket.de/doc_sdat/bsat-3.htm |title=BSat 3a, 3b |last1=Krebs |first1=Gunter Dirk |website=Gunter's Space Page |date=2016-04-17 |access-date=2016-08-29}} 5. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2005/04/27/b-sat-awards-lockheed-martin-authorization-proceed-a2100-small-class-satellite/ |title=B-SAT awards Lockheed Martin Authorization To Proceed on A2100 small-class satellite |archive-url=https://web.archive.org/web/20160906142346/http://www.icaa.eu/lockheed-martin/2005/04/27/b-sat-awards-lockheed-martin-authorization-proceed-a2100-small-class-satellite/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=April 27, 2005 |access-date=2016-09-06}} 6. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2005/05/18/b-sat-awards-lockheed-martin-contract-a2100-small-class-satellite/ |title=B-SAT awards Lockheed Martin contract for A2100 small-class satellite |archive-url=https://web.archive.org/web/20160906150613/http://www.icaa.eu/lockheed-martin/2007/06/19/lockheed-martin-set-deliver-bsat-3a-jcsat-11-spacecraft-3rd-quarter-2007/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=May 18, 2005 |access-date=2016-09-06}} 7. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2007/06/19/lockheed-martin-set-deliver-bsat-3a-jcsat-11-spacecraft-3rd-quarter-2007/ |title=Lockheed Martin Set To Deliver BSAT-3a And JCSAT-11 Spacecraft In 3rd Quarter Of 2007 |archive-url=https://web.archive.org/web/20160906142411/http://www.icaa.eu/lockheed-martin/2005/05/18/b-sat-awards-lockheed-martin-contract-a2100-small-class-satellite/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=June 19, 2007 |access-date=2016-09-06}} 8. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2007/08/10/lockheed-martin-built-bsat-3a-satellite-ready-for-launch/ |title=Lockheed Martin-Built BSAT-3a Satellite Ready For Launch |archive-url=https://web.archive.org/web/20160906150616/http://www.icaa.eu/lockheed-martin/2007/08/10/lockheed-martin-built-bsat-3a-satellite-ready-for-launch/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=August 10, 2007 |access-date=2016-09-06}} 9. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2007/08/14/lockheed-martin-marks-33rd-consecutive-a2100-success-launch-bsat-3a-satellite/ |title=Lockheed Martin Marks 33rd Consecutive A2100 Success With The Launch Of BSAT-3a Satellite |archive-url=https://web.archive.org/web/20160906150617/http://www.icaa.eu/lockheed-martin/2007/08/14/lockheed-martin-marks-33rd-consecutive-a2100-success-launch-bsat-3a-satellite/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=August 14, 2007 |access-date=2016-09-06}} 10. ^1 {{cite web |url=http://www.icaa.eu/lockheed-martin/2007/10/01/lockheed-martin-built-bsat-3a-satellite-begins-service-b-sat-customers/ |title=Lockheed Martin-Built BSAT-3a Satellite Begins Service For B-SAT Customers |archive-url=https://web.archive.org/web/20160906150620/http://www.icaa.eu/lockheed-martin/2007/10/01/lockheed-martin-built-bsat-3a-satellite-begins-service-b-sat-customers/ |archive-date=2016-09-06 |publisher=Lockheed Martin Space Systems |website=Icaa.eu |date=October 1, 2007 |access-date=2016-09-06}} 11. ^1 2 3 {{cite web |url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=2007-036B |title=BSAT 3A |publisher=NASA Space Science Data Coordinated Archive |date=27 April 2016 |access-date=2016-09-06}} 12. ^1 {{cite web |url=https://www.satbeams.com/satellites?norad=32019 |title=BSat 3A |publisher=Satbeams |access-date=2016-09-06}} }}{{Portal|Spaceflight}}{{BSAT satellites}}{{Orbital launches in 2007}} 5 : Communications satellites in geostationary orbit|Satellites using the A2100 bus|Spacecraft launched in 2007|Communications satellites of Japan|Satellites of Japan |
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