SDS-4 ( Small Demonstration Satellite 4 ) is a small satellite (50 cm cube with mass of 50 kg) developed by JAXA . It was launched as a secondary payload on the Shizuku mission on 17 May 2012 UTC.
6-582: In 2019, its ownership was transferred to the SKY Perfect JSAT Corporation (JSAT). Operation was terminated by the end of June 2021. There are four rather specialised systems on the satellite: This article about one or more spacecraft of Japan is a stub . You can help Misplaced Pages by expanding it . SKY Perfect JSAT Corporation The SKY Perfect JSAT Group is a Japanese corporate group that claims to be Asia's largest satellite communication and multi-channel pay TV company. It owns
12-454: Is a communication and broadcasting satellite constellation currently operated by SKY Perfect JSAT Group. It has become the most important commercial constellation in Japan, and the fifth of the world. It has practically amalgamated all private satellite operators in Japan, with only B-SAT left as a local competitor. It began in 1985 with the opening of the communication markets in Japan and
18-521: The SKY PerfecTV! satellite broadcasting service and the SKY Perfect Well Think content studio, among other businesses. SKY Perfect JSAT Holdings Inc. ( 株式会社スカパーJSATホールディングス , Kabushiki-gaisha Sukapā JSAT Holdings ) ( TYO : 9412 ) is the holding company for the group, and holds 100% of the shares of SKY Perfect JSAT Corporation ( スカパーJSAT株式会社 , Sukapā JSAT Kabushiki-gaisha ) ,
24-463: The Japan business of DirecTV . JSAT and SKY Perfect transferred their stock to a joint holding company, SKY Perfect JSAT Corporation , on April 2, 2007. SKY Perfect JSAT Corporation changed its name to SKY Perfect JSAT Holdings Inc. on June 27, 2008. The SKY Perfect JSAT Corporation name was re-adopted by JSAT Corporation, SKY Perfect Communications and Space Communications Corporation when they merged on October 1, 2008. The JSAT constellation
30-491: The group's main operating company. The space and satellite business of the group dates to 1985, when its three predecessor companies were formed: Japan Communications Satellite Company (JCSC), Space Communications Corporation (SCC) and Satellite Japan Corporation (SJC). JCSAT-1 , Japan's first private-sector communications satellite, was launched in 1989. JCSC and SJC merged in 1993, becoming Japan Satellite Systems , which changed its name to JSAT Corporation in 2000. JSAT
36-592: Was listed on the Tokyo Stock Exchange in the same year. SCC was acquired by the Sky Perfect JSAT Group in 2008. The pay TV business of the group dates to 1994, when Japan Digital Broadcast Service was founded (under the temporary name "DMC Planning"). It began the PerfecTV! pay TV service in 1996. Japan Sky Broadcasting ("JSkyB") was founded in 1996 and merged with JDBS in 1998. In 2000 it acquired
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