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JSAT Corporation
JSAT Corporation (JSAT) was the first private Japanese satellite operator, which owned the JSAT satellites, as well as operated and partially owned the N-Star with NTT DoCoMo. Its origins can be traced to the funding of Japan Communications Satellite Company (JCSAT) and Satellite Japan Corporation in 1985. Both companies merged into Japan Satellite Systems Inc. in 1993. In 2000 the company was renamed as JSAT Corporation and was listed in the First Section of the Tokyo Stock Exchange. On September 1, 2008, the company was merged into the SKY Perfect JSAT Group.
With the opening of the Japanese satellite communications market to private investment, Japan Communications Satellite Company (JCSAT) and Satellite Japan Corporation were founded in 1985. In June of the same year, JCSAT awarded an order to Hughes Space and Communications for two identical satellites, JCSAT-1 and JCSAT-2, based on the spin-stabilized HS-393 satellite bus. JCSAT-1, the first commercial Japanese communications satellite, was successfully launched aboard an Ariane-44LP on March 6, 1989. Its brother was launched aboard a Commercial Titan III on January 1, 1990.
In 1992 N-Star was created as a joint venture between JSAT, NTT, NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service. JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload.
Two identical satellites were ordered on 1992 from Space Systems Loral, N-STAR a and N-STAR b, for 1995 and 1996 on orbit delivery. They would be "switchboards in the sky" having S band, C band, Ka band and Ku band payload.
On 1993, Japan Communications Satellite Company and Satellite Japan Corporation merged to form Japan Satellite Systems Inc. (JCSAT). That same year, JCSAT orderedJCSAT-3, a third satellite from Hughes, using the HS-601 platform.
In 1995, JCSAT obtained a license for international service, and thus became a regional operator. On August 29, 1995 an Atlas IIAS successfully launched JCSAT-3 into orbit. On the same August 29 but on an Ariane 44P, N-STAR a was successfully launched. On December, JCSAT ordered a fourth satellite, JCSAT-4, with the same manufacturer and platform as JCSAT-3.
N-STAR b, launched on February 5, 1996, also aboard an Ariane 44P. The satellite telephone service was operational in March 1996. In June 1996, JCSAT ordered JCSAT-5, another HS-601-based satellite, and the twin JCSAT-6 in December, from Hughes. On February 17, 1997 JCSAT-4 was renamed JCSAT-R after being put in orbit by an Atlas IIAS.
By September 1997, both JCSAT and Space Communications Corporation (SCC) had requested the 110°East position. The Japanese government made both companies share the 100°E position, and thus both made a joint order in November 1998 for N-SAT-110 from Lockheed Martin. It was also called JCSAT-7 by JCSAT, and Superbird-5 by SCC. On December 2, an Ariane-44P successfully orbited JCSAT-5, which became JCSAT-1B. JSAT-6 was rechristened as JCSAT-4A after successfully being injected in its transfer orbit by an Atlas IIAS on February 16, 1999.
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JSAT Corporation
JSAT Corporation (JSAT) was the first private Japanese satellite operator, which owned the JSAT satellites, as well as operated and partially owned the N-Star with NTT DoCoMo. Its origins can be traced to the funding of Japan Communications Satellite Company (JCSAT) and Satellite Japan Corporation in 1985. Both companies merged into Japan Satellite Systems Inc. in 1993. In 2000 the company was renamed as JSAT Corporation and was listed in the First Section of the Tokyo Stock Exchange. On September 1, 2008, the company was merged into the SKY Perfect JSAT Group.
With the opening of the Japanese satellite communications market to private investment, Japan Communications Satellite Company (JCSAT) and Satellite Japan Corporation were founded in 1985. In June of the same year, JCSAT awarded an order to Hughes Space and Communications for two identical satellites, JCSAT-1 and JCSAT-2, based on the spin-stabilized HS-393 satellite bus. JCSAT-1, the first commercial Japanese communications satellite, was successfully launched aboard an Ariane-44LP on March 6, 1989. Its brother was launched aboard a Commercial Titan III on January 1, 1990.
In 1992 N-Star was created as a joint venture between JSAT, NTT, NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service. JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload.
Two identical satellites were ordered on 1992 from Space Systems Loral, N-STAR a and N-STAR b, for 1995 and 1996 on orbit delivery. They would be "switchboards in the sky" having S band, C band, Ka band and Ku band payload.
On 1993, Japan Communications Satellite Company and Satellite Japan Corporation merged to form Japan Satellite Systems Inc. (JCSAT). That same year, JCSAT orderedJCSAT-3, a third satellite from Hughes, using the HS-601 platform.
In 1995, JCSAT obtained a license for international service, and thus became a regional operator. On August 29, 1995 an Atlas IIAS successfully launched JCSAT-3 into orbit. On the same August 29 but on an Ariane 44P, N-STAR a was successfully launched. On December, JCSAT ordered a fourth satellite, JCSAT-4, with the same manufacturer and platform as JCSAT-3.
N-STAR b, launched on February 5, 1996, also aboard an Ariane 44P. The satellite telephone service was operational in March 1996. In June 1996, JCSAT ordered JCSAT-5, another HS-601-based satellite, and the twin JCSAT-6 in December, from Hughes. On February 17, 1997 JCSAT-4 was renamed JCSAT-R after being put in orbit by an Atlas IIAS.
By September 1997, both JCSAT and Space Communications Corporation (SCC) had requested the 110°East position. The Japanese government made both companies share the 100°E position, and thus both made a joint order in November 1998 for N-SAT-110 from Lockheed Martin. It was also called JCSAT-7 by JCSAT, and Superbird-5 by SCC. On December 2, an Ariane-44P successfully orbited JCSAT-5, which became JCSAT-1B. JSAT-6 was rechristened as JCSAT-4A after successfully being injected in its transfer orbit by an Atlas IIAS on February 16, 1999.