JCSAT-11
| Mission type | Communication |
|---|---|
| Operator | SKY Perfect JSAT Group |
| COSPAR ID | 2007-F03[1] |
| Spacecraft properties | |
| Spacecraft | JCSAT-11 |
| Bus | A2100AX |
| Manufacturer | Lockheed Martin |
| Launch mass | 4,007 kg (8,834 lb) |
| Dimensions | 27 m × 9 m (89 ft × 30 ft) with solar panels and antennas deployed. |
| Start of mission | |
| Launch date | 22:43:10, September 5, 2007 (UTC) |
| Rocket | Proton-M/Briz-M |
| Launch site | BaikonurSite 200/39 |
| Contractor | ILS |
| End of mission | |
| Destroyed | Launch failure |
| Transponders | |
| Band | 18 × 27 Mhz and 12 × 36 MHzKuband 12 × 36 MHzC band |
| Bandwidth | 1,350 MHz |
| TWTA power | Kuband127 W C band48 W |
JCSAT-11,was ageostationarycommunications satelliteordered byJSAT Corporation(nowSKY Perfect JSAT Group) which was designed and manufactured byLockheed Martinon theA2100platform. The satellite was designated to be used as an on-orbit, but was lost on launch failure.[2]
Satellite description
[edit]The spacecraft was designed and manufactured byLockheed Martinon theA2100AXsatellite bus.It had a launch mass of 4,007 kg (8,834 lb) and a 15-year design life. A near copy ofJCSAT-3A,it was to be used as an on orbit spare.[2]As most satellites based on the A2100 platform, it uses a 460 N (100 lbf)LEROS-1CLAEfororbit raising.[2]Its solar panels span 27 m (89 ft) when fully deployed and, with its antennas in fully extended configuration it is 9 m (30 ft) wide.[3]
Its payload is composed of eighteen 27 MHz and twelve 36 MHzKubandplus twelveC bandtransponders,for a total bandwidth of 1,350 MHz.[4]Itshigh-power amplifiershad an output power of 127Wattson Kuband and 48 Watts on C band.[3]
History
[edit]On October 3, 2005, JSAT ordered anA2100AXbased satellite fromLockheed Martin,JCSAT-11.It would be an almost copy ofJCSAT-3A,with aC bandandKubandpayload. It was expected to be launched in 2007 to act as a backup for the whole JSAT fleet.[5]
The almost 19-year streak of successful JCSAT launches was ended when aProton-M/Briz-Mfailed to orbit JCSAT-11 on September 5, 2007. A damaged pyro firing cable on the interstage truss prevented the second stage from controlling its direction, and the rocket and its payload crashed into the Kazakhstan steppes.[6]Being lucky in misfortune, JCSAT-11 was simply an on-orbit backup and thus it had no operational impact on the fleet.[2]
The same day of the launch failure, JSAT placed an order with Lockheed for an identical replacement,JCSAT-12,for launch in 2009.[2]On September 19, 2007, they closed a deal withArianespacefor a launch slot with an Ariane 5 for its launch.[7]
References
[edit]- ^McDowell, Jonathan."Proton".Retrieved2016-08-10.
- ^abcdeKrebs, Gunter Dirk (2016-04-21)."JCSat 10, 11, 12 (JCSat 3A, RA)".Gunter's Space Page.Retrieved2016-07-20.
- ^ab"JCSAT-RA".SKY Perfect JSAT Group.Archived fromthe originalon August 18, 2016.RetrievedAugust 9,2016.
- ^"Who we are".SSKY Perfect JSAT Group.2012-08-03. Archived fromthe original(PDF)on 2016-09-08.Retrieved2016-08-02.
- ^"JSAT Corporation Awards Lockheed Martin Contract For Third A2100 Satellite".Icaa.eu.Lockheed Martin Space Systems.October 3, 2005.Retrieved2016-08-05.
- ^Zak, Anatoly (September 12, 2007)."Proton/JCSAT-11 launch failure".Russian Space Web.Retrieved2016-08-05.
- ^"Arianespace to Launch Japanese Satellite JCSAT-12".Defense-aerospace.com.Arianespace.September 19, 2007. Archived fromthe originalon 2021-11-21.Retrieved2016-08-05.
