BSAT-3a

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 broadcasting across Japan.[2][4][5]

BSAT-3a
Mission typeCommunication
OperatorB-SAT
COSPAR ID2007-036B[1]
SATCAT no.32019
WebsiteB-SAT Satellite Fleet
Spacecraft properties
SpacecraftBSAT-3a
BusA2100[2]
ManufacturerLockheed Martin
Launch mass1,980 kg (4,370 lb)
Dry mass927 kg (2,044 lb)[2]
Dimensions3.8 m × 1.9 m × 1.9 m (12.5 ft × 6.2 ft × 6.2 ft)[3]
Power2.8 kW[3]
Start of mission
Launch date23:44, August 14, 2007 (UTC) (2007-08-14T23:44Z)[1]
RocketAriane 5 ECA VA-177
Launch siteGuiana Space Center ELA-3
ContractorArianespace
Orbital parameters
RegimeGEO
Longitude110° East
Transponders
Band8 (plus 4 spares) Ku band
TWTA power130 Watts
 

Satellite description

BSAT-3a was designed and manufactured by Lockheed Martin on the A2100 satellite bus for B-SAT. It had a launch mass of 1,980 kg (4,370 lb), a dry mass of 927 kg (2,044 lb), and a 13-year design life.[3] As most satellites based on the A2100 platform, it uses a 460 N (100 lbf) LEROS-1C LAE for orbit raising.[4]

It measured 3.8 m × 1.9 m × 1.9 m (12.5 ft × 6.2 ft × 6.2 ft) 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 14.65 m (48.1 ft) when fully deployed.[3]

It has a single Ku band payload with 8 active transponders plus four spares with a TWTA output power of 130 Watts.[2]

History

On 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.[6] 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.[7] On June 15, 2005, Arianespace announced that it had been awarded the launch contract for BSAT-3a.[8]

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.[9]

On August 10, 2007, Lockheed announced that BSAT-3a was mated to the launcher and ready for its ride to orbit.[10] 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.[11] 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.[12]

It was entered into service on October 1, 2007 after successfully passing the on-orbit deployment and checkout phase.[2][13]

gollark: As someone who uses the internet, it worries me that so much bandwidth on major internet links is probably just used shuffling people's data around so they can watch region locked content or since they were fearmongered into thinking it was necessary.
gollark: On VPNs: https://m.youtube.com/watch?v=WVDQEoe6ZWY
gollark: Arguably, there exist additional pronouns.
gollark: There exists a channel named <#756798394600652860>.
gollark: I think you can block pings from specific servers temporarily.

References
  1. "BSAT 3A". NASA Space Science Data Coordinated Archive. 27 April 2016. Retrieved 2016-09-06.
  2. "放送衛星3機のスペック" [Specifications of the three broadcasting satellites]. Broadcasting Satellite System Corporation. Retrieved 2016-09-06.
  3. "Launch Kit V-177" (PDF). Arianespace. August 7, 2007. Archived from the original (PDF) on 2007-09-27. Retrieved 2016-09-06.
  4. Krebs, Gunter Dirk (2016-04-17). "BSat 3a, 3b". Gunter's Space Page. Retrieved 2016-08-29.
  5. "BSat 3A". Satbeams. Retrieved 2016-09-06.
  6. "B-SAT awards Lockheed Martin Authorization To Proceed on A2100 small-class satellite". Icaa.eu. Lockheed Martin Space Systems. April 27, 2005. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  7. "B-SAT awards Lockheed Martin contract for A2100 small-class satellite". Icaa.eu. Lockheed Martin Space Systems. May 18, 2005. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  8. "Arianespace Will Launch BSAT-3A for Japan". defense-aerospace.com. Arianespace. Jun 15, 2005. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  9. "Lockheed Martin Set To Deliver BSAT-3a And JCSAT-11 Spacecraft In 3rd Quarter Of 2007". Icaa.eu. Lockheed Martin Space Systems. June 19, 2007. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  10. "Lockheed Martin-Built BSAT-3a Satellite Ready For Launch". Icaa.eu. Lockheed Martin Space Systems. August 10, 2007. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  11. "Flight 177: Ariane 5 – Satellites: SPACEWAY 3 & BSAT-3A". Airbus. August 9, 2007. Archived from the original on 2016-09-06. Retrieved 2016-09-05.
  12. "Lockheed Martin Marks 33rd Consecutive A2100 Success With The Launch Of BSAT-3a Satellite". Icaa.eu. Lockheed Martin Space Systems. August 14, 2007. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
  13. "Lockheed Martin-Built BSAT-3a Satellite Begins Service For B-SAT Customers". Icaa.eu. Lockheed Martin Space Systems. October 1, 2007. Archived from the original on 2016-09-06. Retrieved 2016-09-06.
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