Broadcasting Satellite System Corporation#BSAT-2b
{{short description|Japanese satellite operator}}
The Broadcasting Satellite System Corporation (B-SAT) is a Japanese corporation established in April 1993 to procure, manage and lease transponders on communications satellites. Its largest stockholder, owning 49.9%, is NHK, the Japan Broadcasting Corporation.{{cite web|url=http://www.b-sat.co.jp/english/index.html|title=Broadcasting Satellite System Corporation Profile|publisher=B-SAT|url-status=dead|archiveurl=https://web.archive.org/web/20090707233525/http://www.b-sat.co.jp/english/index.html|archive-date=7 July 2009}} In 1994, it was ranked by Space News as the world's 19th largest fixed satellite operator.{{cite web|url=http://www.space.com/spacenews/top20_satellite_2004.html|title=Top 20 Fixed Satellite Operators, 2004|publisher=Space News|url-status=dead|archiveurl=https://web.archive.org/web/20050831115258/http://www.space.com/spacenews/top20_satellite_2004.html|archive-date=31 August 2005}}
Satellite fleet
The B-SAT fleet has an extensive history. This is an overview of the satellites.
= Former satellites =
== BSAT-1a ==
BSAT-1a was an HS-376 based satellite with 4 active plus 4 spares Ku-band transponders. It was successfully launched on 16 April 1997 aboard an Ariane 44LP along Thaicom 3.
== BSAT-1b ==
BSAT-1b was an HS-376 based satellite with 4 active plus 4 spares Ku-band transponders. It was successfully launched on 28 April 1998 aboard an Ariane 44P along Nilesat 101.
== BSAT-2a ==
BSAT-2a was manufactured by Orbital Sciences Corporation based on the Star Bus platform. It was launched aboard an Ariane 5G rocket on 8 March 2001. BSAT-2a serves as an on orbit backup to BSAT-2c. BSAT-2a was decommissioned in January 2013.
== BSAT-2b ==
== BSAT-2c ==
BSAT-2c was manufactured by Orbital Sciences Corporation Based on the Star Bus platform. It was launched aboard an Ariane 5 rocket on 11 June 2003. In-orbit delivery to B-SAT took place 15 July 2003.{{cite web|url=http://www.orbital.com/NewsInfo/release.asp?prid=420|title=ORBITAL MAKES FINAL IN-ORBIT DELIVERY OF BSAT-2c SATELLITE|publisher=Orbital Sciences}} BSAT-2c was decommissioned in August 2013.
= Current satellites =
== BSAT-3a ==
Launched on 14 August 2007 by an Ariane 5 ECA launch vehicle.{{cite web|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2007-036B|title=BSAT-3A - NSSDC ID: 2007-036B |publisher=NASA}} {{PD-notice}} It was manufactured by Lockheed Martin Commercial Space Systems based on the A2100A platform design, with a communications payload containing 12 Ku-band channels, eight of which operate at one time.{{cite web|url=http://www.lockheedmartin.com/news/press_releases/2007/0810ss_BSATAdvisory.html|title=Lockheed Martin-Built BSAT-3a Satellite Ready For Launch|publisher=Lockheed Martin|url-status=dead |archiveurl=https://web.archive.org/web/20080305235835/http://www.lockheedmartin.com/news/press_releases/2007/0810ss_BSATAdvisory.html|archive-date=2008-03-05}} Located in geostationary orbit at 110.0° East longitude, it replaced BSAT-1a and BSAT-1b.
== BSAT-3b ==
B-SAT awarded Lockheed Martin the contract to build its next geostationary telecommunications satellite, BSAT-3b, which was launched by Arianespace aboard an Ariane 5 ECA (along with the Eutelsat W3B) on 28 October 2010.{{cite web|url=http://www.lockheedmartin.com/news/press_releases/2008/04-15-bsat.html|title=B-SAT AWARDS LOCKHEED MARTIN CONTRACT FOR BSAT-3b SATELLITE|date=2008-04-15 |publisher=Lockheed Martin|url-status=dead|archiveurl=https://web.archive.org/web/20080521040705/http://www.lockheedmartin.com/news/press_releases/2008/04-15-bsat.html|archive-date=21 May 2008}}{{cite web|url=http://www.lockheedmartin.com/news/press_releases/2010/1028_ss_bsat.html|title=Lockheed Martin-Built BSAT-3b Satellite Successfully Launched for the Broadcasting Satellite System Corporation of Japan|date=2010-10-28|publisher=Lockheed Martin|url-status=dead|archiveurl=https://web.archive.org/web/20101204173126/http://www.lockheedmartin.com/news/press_releases/2010/1028_ss_bsat.html|archive-date=4 December 2010}}{{cite web|url=http://www.lockheedmartin.com/news/press_releases/2010/1104-SS-bsatOK.html|title=All Systems Are Nominal Aboard Lockheed Martin Bsat-3b Satellite Following October 28 Launch|date=2010-11-04|publisher=Lockheed Martin|url-status=dead|archiveurl=https://web.archive.org/web/20101113042031/http://www.lockheedmartin.com/news/press_releases/2010/1104-SS-bsatOK.html|archive-date=13 November 2010}}
== BSAT-3c ==
BSAT-3c, also known as JCSAT-110R, is a satellite co-owned with SKY Perfect JSAT with each operator owning a separate payload. It was built by Lockheed Martin on its A2100A platform. It has two separate payloads with 12 Ku-band transponders each. It was successfully launched on 7 August 2011 on an Ariane 5 ECA along Astra 1N.
== BSAT-4a ==
The first satellite of the fourth generation BSAT was built by SSL on its SSL 1300 platform. It has 24 Ku-band transponders and mass of {{convert|3520|kg}}. BSAT-4a launched on 29 September 2017 aboard an Ariane 5 ECA.
== BSAT-4b ==
The second satellite of the fourth generation BSAT was built by Maxar Technologies on its SSL 1300 platform. It has 24 Ku-band transponders and mass around {{convert|3530|kg}}. BSAT-4b was launched aboard an Ariane 5 ECA on 15 August 2020.[http://www.b-sat.co.jp B-SAT corporation]
= Satellite list =
| class="wikitable sortable mw-collapsible" |
| Name
! Bus ! Payload ! Order ! Launch ! Launch Vehicle ! Launch Result ! Launch Weight ! Status ! Remarks |
|---|
| BS-3N
| AS-3000 ||3 Ku-band || {{NA}} || 8 July 1994 || Ariane 44L || {{success}} || {{convert|1100|kg}} || {{bad|Decommissioned in August 2011}} || Launched with PAS 2. Transferred to B-SAT in November 1998. |
| BSAT-1a
| HS-376 ||4 Ku-band || 1993 || 16 April 1997 || Ariane 44LP || {{success}} || {{convert|1236|kg}} || {{bad|Decommissioned in August 2010}} || Launched with Thaicom 3. |
| BSAT-1b
| HS-376 ||4 Ku-band || 1993 || 28 April 1998 || Ariane 44P || {{success}} || {{convert|1236|kg}} || {{bad|Decommissioned in August 2011}} || Launched with Nilesat 101. |
| BSAT-2a
| STAR-1 ||4 Ku-band || 1999 || 8 March 2001 || Ariane 5G || {{success}} || {{convert|1292|kg}} || {{bad|Decommissioned in January 2013}} || Launched with Eurobird 1. |
| BSAT-2b
| STAR-1 ||4 Ku-band || 1999 || 12 July 2001 || Ariane 5G || {{failure}} || {{convert|1292|kg}} || {{failure|Launch failure}} || Launched with Artemis. Launch failure left it in too low an orbit. |
| BSAT-2c
| STAR-1 ||4 Ku-band || 2001 || 11 June 2003 || Ariane 5G || {{success}} || {{convert|1275|kg}} || {{bad|Decommissioned in August 2013}} || Launched with Optus C1. |
| BSAT-3a
| A2100A ||12 Ku-band || 2005 || 14 August 2007 || Ariane 5 ECA || {{success}} || {{convert|1967|kg}} || {{success|Operational at 110.0° East}} || Launched along Spaceway-3. |
| BSAT-3b
| A2100A ||12 Ku-band || 2008 || 28 October 2010 || Ariane 5 ECA || {{success}} || {{convert|2060|kg}} || {{success|Operational at 110.0° East}} || Launched with Eutelsat W3B. |
| BSAT-3c
| A2100A || 24 Ku-band and 24 C-band|| 2008 || 6 August 2011 || Ariane 5 ECA || {{success}} || {{convert|2910|kg}} || {{success|Operational at 110.0° East}} || Launched with Astra 1N. Co-owned with SKY Perfect JSAT, named as JCSAT-110R. Backup of N-SAT-110. |
| BSAT-4a
| SSL 1300 || 24 Ku-band || 2015 || 29 September 2017 || Ariane 5 ECA || {{success}} || {{convert|3520|kg}} || {{success|Operational at 110.0° East}} || Launched with Intelsat 37e |
| BSAT-4b
| SSL 1300 || 24 Ku-band || 2018 || 15 August 2020 || Ariane 5 ECA || {{success}} || {{convert|3530|kg}} || {{success}} at 110.0° East || Launched with Galaxy 30 and MEV-2 |
References
{{Portal|Spaceflight}}
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{{BSAT satellites}}
{{Telecommunications}}
Category:Communications satellite operators
Category:Direct broadcast satellite services
Category:Telecommunications companies of Japan
Category:Telecommunications companies established in 1993
Category:Japanese companies established in 1993