BSAT-2b
| Mission type | Communication |
|---|---|
| Operator | B-SAT |
| COSPAR ID | 2001-029B[1] |
| SATCATno. | 26864 |
| Mission duration | Launch failure |
| Spacecraft properties | |
| Spacecraft | BSAT-2b |
| Bus | STAR-1[2] |
| Manufacturer | Orbital Sciences Corporation |
| Launch mass | 1,317 kg (2,903 lb) |
| Dry mass | 535 kg (1,179 lb) |
| Dimensions | 3.76 m × 2.49 m × 2.03 m (12.3 ft × 8.2 ft × 6.7 ft) |
| Power | 2.6 kW |
| Start of mission | |
| Launch date | 23:58, July 12, 2001 (UTC)(failure)[1] |
| Rocket | Ariane 5GV-142 |
| Launch site | Guiana Space CenterELA-3 |
| Contractor | Arianespace |
| End of mission | |
| Disposal | Decayed from wrong orbit |
| Decay date | January 28, 2014 |
| Transponders | |
| Band | 4 (plus 4 spares)Kuband |
| TWTA power | 130 Watts |
BSAT-2b,was ageostationarycommunications satelliteordered byB-SATwhich was designed and manufactured byOrbital Sciences Corporationon theSTAR-1platform. It was designed to be stationed on the 110° East orbital slot along its companionBSAT-2awhere it would provide redundanthigh definitiondirect television broadcastingacross Japan.[3][4]
But theAriane 5Grocket had an anomaly during its July 12, 2001 launch. It left BSAT-2b stranded in an orbit too low for its propulsion system to compensate and the spacecraft was written off.[5][6][1]BSAT orderedBSAT-2cimmediately to replace it.[7]It decayed and burned in the atmosphere on January 28, 2014.[1][8]
Satellite description[edit]
BSAT-2bwas designed and manufactured byOrbital Sciences Corporationon theSTAR-1satellite busforB-SAT.It had a launch mass of 1,317 kg (2,903 lb), a dry mass of 927 kg (2,044 lb), and a 10-year design life.[9]As all four STAR-1 satellites, it had a solid rocketStar 30CBPapogee kick motorfororbit raising,plus 200 kg (440 lb) of propellant for its liquid propellant station keeping thrusters.[4][2][10]
It measured 3.76 m × 2.49 m × 2.03 m (12.3 ft × 8.2 ft × 6.7 ft) when stowed for launch. Its dual wing solar panels can generate 2.6 kW of power at the beginning of its design life, and span 16.10 m (52.8 ft) when fully deployed.[9]
It has a singleKubandpayload with four activetranspondersplus four spares with aTWTAoutput power of 130Watts.[3][9]
History[edit]
In March 1999,B-SATordered fromOrbital Sciences Corporationtwo satellites based on theSTAR-1platform:BSAT-2aandBSAT-2b.[7]This was the second order of the bus and the first since Orbital had acquired CTA Space Systems, the original developer.[2]
BSAT-2b was launched aboard anAriane 5Gat 23:58 UTC, July 12, 2001, fromGuiana Space CenterELA-3.[5]It rode on the lower berth belowArtemis.But the EPS upper stage had an anomaly and left the satellites on a 17,528 km × 592 km × 2.9° orbit, short of the planned 35,853 km × 858 km × 2.0°. While Artemis used itselectric propulsionto make up for the difference. But BSAT-2bStar 30CBPapogee kick motorcould not make up for the orbital energy short fall and was written off.[6][1][7]
On January 28, 2014, BSAT-2b decayed from its orbit and burned in the atmosphere.[1][8]
References[edit]
- ^abcdef"BSAT 2B".NASA Space Science Data Coordinated Archive. April 27, 2016.RetrievedSeptember 7,2016.
- ^abcRichmond, Christopher W. (2008)."The Growth of Orbital Sciences and the Market for Small GEO Satellites"(PDF).Space Japan Review (English Version)(55). AIAA JFSC. Archived fromthe original(PDF)on September 6, 2016.RetrievedSeptember 6,2016.
- ^ab"BSAT-2 Series"(PDF).Orbital ATK.2015. Archived fromthe original(PDF)on September 6, 2016.RetrievedSeptember 6,2016.
- ^abKrebs, Gunter Dirk (April 17, 2016)."BSat 2a, 2b".Gunter's Space Page.RetrievedAugust 29,2016.
- ^abRay, Justin (July 12, 2001)."Ariane 5 falls short".Space Flight Now.RetrievedSeptember 8,2016.
- ^abRay, Justin (July 13, 2001)."Ariane 5 failure investigation focuses on upper stage".Space Flight Now.RetrievedSeptember 8,2016.
- ^abc"Duyên cách"[History].Broadcasting Satellite System Corporation.RetrievedSeptember 7,2016.
- ^ab"BSAT-2B".n2yo.com.RetrievedSeptember 9,2016.
- ^abc"Launch Kit V-142"(PDF).Arianespace.July 5, 2001. Archived fromthe original(PDF)on April 11, 2004.RetrievedSeptember 6,2016.
- ^Wade, Mark."Star Bus".Astronautix.com.Encyclopaedia Astronautica. Archived fromthe originalon August 20, 2016.RetrievedSeptember 7,2016.
