JSAT Corporation

JSAT Corporation (JSAT) is satellite operator with a fleet of 8 satellites in orbit. According to a 2004 report, JSAT was the fifth largest satellite operator in the world, ranked by 2003 fiscal year revenue. [cite web | url = http://www.space.com/spacenews/top20_satellite_2004.html | title = Top 20 Fixed Satellite Operators, 2004
publisher = Space News] JSAT was the first private-sector satellite communications operator in Japan, beginning its operations following the enactment of Japan's Telecommunications Business Law in 1985. [cite web | url = http://www.jsat.net/en/corporate/index.html | title = What's JSAT | publisher = JSAT]

JCSAT-11

On February 6, 2006 JSAT announced it had contracted with International Launch Services (ILS) to launch its JCSAT-11 satellite on a Proton-M. [cite web | url = http://www.satnews.com/stories2006/2094.htm | title = JSAT Selects ILS Proton to Launch JCSAT-11 Satellite | publisher = Satnews Daily] The satellite was based on the Lockheed-Martin A2100 design. [cite web | url = http://sev.prnewswire.com/aerospace-defense/20070904/AQTU04204092007-1.html | title = Lockheed Martin-Built JCSAT-11 Satellite Ready for Launch from Baikonur Cosmodrome | publisher = PRNewswire] Launch occurred at 22:43 GMT, on 5 September 2007, from LC-200/39 at the Baikonur Cosmodrome. Due to a mulfunction of the second stage of the rocket the spacecraft failed to reach orbit. Instead, the spacecraft and rocket debris impacted about km to mi | 40|abbr=yes|wiki=yes from the city of Zhezqazghan, in the central Karaganda region of Kazakhstan. [cite web | url = http://www.rferl.org/featuresarticle/2007/09/98762941-D104-4249-A9AF-40911DE63466.html
title = Kazakhs Announce Probe Into Russian Rocket Crash
publisher = Radio Free Europe / Radio Liberty]

JCSAT-11 was intended as a backup to JSAT's existing eight spacecraft. After the launch failure,JSAT Corporation announced plans to purchase an identical replacement satellite. [cite web | url = http://www.jsat.net/en/renewal/release/release/files/20070906-01.pdf
title = Order of the Replacement Satellite of JCSAT-11 Backup Satellite Following Launch Failure
publisher = JSAT] On September 19, 2007, launch service provider Arianespace announced that JSAT had chosen the Ariane 5 as the launch vehicle for JCSAT-12. [cite web | url = http://www.arianespace.com/site/news/releases/07_09_19_release_index.html | title = Arianespace to launch Japanese satellite JCSAT-12 | publisher = Arianespace]

Horizons Satellite LLC

JSAT is a 50% equity owner of Horizons Satellite LLC, a joint venture with Intelsat. On December 21, 2007, Arianespace used an Ariane 5 rocket to launch the Horizons-2 satellite.

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