Engineering:BSAT-2b
| Mission type | Communication |
|---|---|
| Operator | B-SAT |
| COSPAR ID | 2001-029B[1] |
| SATCAT no. | 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 5G V-142 |
| Launch site | Guiana Space Center ELA-3 |
| Contractor | Arianespace |
| End of mission | |
| Disposal | Decayed from wrong orbit |
| Decay date | January 28, 2014 |
| Transponders | |
| Band | 4 (plus 4 spares) Ku band |
| TWTA power | 130 Watts |
B-SAT | |
BSAT-2b, was a geostationary communications satellite ordered by B-SAT which was designed and manufactured by Orbital Sciences Corporation on the STAR-1 platform. It was designed to be stationed on the 110° East orbital slot along its companion BSAT-2a where it would provide redundant high definition direct television broadcasting across Japan.[3][4]
But the Ariane 5G rocket 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 ordered BSAT-2c immediately to replace it.[7] It decayed and burned in the atmosphere on January 28, 2014.[1][8]
Satellite description
BSAT-2b was designed and manufactured by Orbital Sciences Corporation on the STAR-1 satellite bus for B-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 rocket Star 30CBP apogee kick motor for orbit 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 single Ku band payload with four active transponders plus four spares with a TWTA output power of 130 Watts.[3][9]
History
In March 1999, B-SAT ordered from Orbital Sciences Corporation two satellites based on the STAR-1 platform: BSAT-2a and BSAT-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 an Ariane 5G at 23:58 UTC, July 12, 2001, from Guiana Space Center ELA-3.[5] It rode on the lower berth below Artemis. 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 its electric propulsion to make up for the difference. But BSAT-2b Star 30CBP apogee kick motor could 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "BSAT 2B". NASA Space Science Data Coordinated Archive. 27 April 2016. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2001-029B.
- ↑ 2.0 2.1 2.2 Richmond, Christopher W. (2008). "The Growth of Orbital Sciences and the Market for Small GEO Satellites". Space Japan Review (English Version) (AIAA JFSC) (55). http://satcom.jp/English/e-55/executivecommente.pdf. Retrieved 2016-09-06.
- ↑ 3.0 3.1 "BSAT-2 Series". Orbital ATK. 2015. https://www.orbitalatk.com/space-systems/commercial-satellites/communications-satellites/docs/FS008_01_OA_3695%20BSAT-2.pdf.
- ↑ 4.0 4.1 Krebs, Gunter Dirk (2016-04-17). "BSat 2a, 2b". http://space.skyrocket.de/doc_sdat/bsat-2.htm.
- ↑ 5.0 5.1 Ray, Justin (July 12, 2001). "Ariane 5 falls short". Space Flight Now. https://spaceflightnow.com/ariane/v142/.
- ↑ 6.0 6.1 Ray, Justin (July 13, 2001). "Ariane 5 failure investigation focuses on upper stage". Space Flight Now. https://spaceflightnow.com/ariane/v142/010713followup.html.
- ↑ 7.0 7.1 7.2 "沿革". Broadcasting Satellite System Corporation. http://www.b-sat.co.jp/company-profile/history/.
- ↑ 8.0 8.1 "BSAT-2B". n2yo.com. http://www.n2yo.com/satellite/?s=26864.
- ↑ 9.0 9.1 9.2 "Launch Kit V-142". Arianespace. July 5, 2001. http://www.arianespace.com/site/news/kit/V142launchkit.pdf.
- ↑ Wade, Mark. "Star Bus". Encyclopaedia Astronautica. http://www.astronautix.com/s/starbus.html.
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