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]

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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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