JCSAT-RAとは 意味・読み方・使い方

JCSAT-RA, previously known as JCSAT-12, is a Japanese geostationary communications satellite, which is operated by JSAT Corporation. It was ordered to replace the JCSAT-11 satellite which was lost in a launch failure on a Proton-M/Briz-M rocket in 2007, and is currently used as an on-orbit spare satellite; a role in which it replaced the older JCSAT-R spacecraft, providing a reserve for if one of the company's other satellites fails. It is a 4,000-kilogram (8,800 lb) satellite, which was constructed by Lockheed Martin based on the A2100AX satellite bus, with the same configuration as JCSAT-10 and JCSAT-11. The contract to built JCSAT-12 was awarded on 6 September 2007, the day after JCSAT-11 failed to reach orbit.