See also
- JCSAT-5A – Also known as N-STAR d, was the follow on satellite.
| Mission type | Communications |
|---|---|
| Operator | SKY Perfect JSAT Group |
| COSPAR ID | 1995-044A [1] |
| SATCAT no. | 23651 |
| Mission duration | 10 years (planned) |
| Spacecraft properties | |
| Spacecraft | N-STAR a |
| Bus | SSL 1300 |
| Manufacturer | Space Systems/Loral |
| Launch mass | 3,400 kg (7,500 lb) [2] |
| BOL mass | 2,050 kg (4,520 lb) |
| Dry mass | 1,617 kg (3,565 lb) |
| Start of mission | |
| Launch date | 29 August 1995, 06:41:00 UTC [1] |
| Rocket | Ariane 44P H10-3 |
| Launch site | Kourou, ELA-2 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric orbit [3] |
| Regime | Geostationary orbit |
| Transponders | |
| Band | 6 C-band 11 Ka-band 8 Ku-band 1 S-band [4] |
| Coverage area | Japan |
N-STAR a, was a geostationary communications satellite originally ordered by a consortium including NTT DoCoMo and JSAT Corporation, and later fully acquired by JSAT, which was merged into SKY Perfect JSAT Group. It was designed and manufactured by Space Systems/Loral on the SSL 1300 platform. [2] It had a launch weight of 3,400 kg (7,500 lb), and a 10-year design life. [2] Its payload is composed of 6 C-band, 11 Ka-band, 8 Ku-band and 1 S-band transponders.
N-Star was created as a joint venture between JSAT, Nippon Telegraph and Telephone (NTT), NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service. [5] JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload. [6] [7]
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. [8] [9] They would be "switchboards in the sky" having S-band, C-band, Ka-band and Ku-band payload. [10]
N-STAR a was successfully launched aboard an Ariane 44P on 29 August 1995. Its twin, N-STAR b, launched on 5 February 1996, also aboard an Ariane 44P. [2] [10] The satellite telephone service was operational in March 1996. In March 2000, the packet communications service was introduced. [11] In March 2000, JSAT received the NTT Communications interest in the N-STAR a and N-STAR b. [12] [13]
In August 2003, the JSAT acquired the NTT DoCoMo interest on N-STAR a and N-STAR b, whom then leased them back. [14] [15]
JCSAT-5A or N-STAR d, known as JCSAT-9 before launch, is a geostationary communications satellite operated by SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Lockheed Martin on the A2100 platform.
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.
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 the SKY PerfecTV! satellite broadcasting service and the SKY Perfect Well Think content studio, among other businesses.
Superbird-A, also identified as Superbird-1 before launch, was a geostationary communications satellite designed and manufactured by Ford Aerospace) on the SSL 1300 satellite bus. It was originally ordered by Space Communications Corporation (SCC), which later merged into the SKY Perfect JSAT Group. It had a mixed Ku-band, Ka-band and X-band payload and operated on the 158° East longitude.
JCSAT-16 is a geostationary communications satellite operated by SKY Perfect JSAT Group and designed and manufactured by SSL on the SSL 1300 platform. It has a launch weight of 4,600 kg (10,100 lb), a power production capacity of 8.5 kW and a 15-year design life. Its payload is composed of Ku band and Ka band transponders. SKY Perfect JSAT Group plans to use JCSAT-16 as an in-orbit backup satellite for the Ku- and Ka-band satellites serving the Japanese market.
JCSAT-4B, known as JCSAT-13 before launch, is a geostationary communications satellite operated by SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Lockheed Martin on the A2100 platform.
BSAT-3c, also known as JCSAT-110R, is a geostationary communications satellite operated by Broadcasting Satellite System Corporation (B-SAT) and SKY Perfect JSAT (JSAT) which was designed and manufactured by Lockheed Martin on the A2100 platform.
JCSAT-2B, known as JCSAT-14 before commissioning, is a geostationary communications satellite operated by SKY Perfect JSAT Group and designed and manufactured by SSL on the SSL 1300 platform. It had a launch weight of 4,696.2 kg (10,353 lb), a power production capacity of 9 to 9.9 kW at end of life and a 15-year design life. Its payload is composed of 26 C band and 18 Ku band transponders with a total bandwidth of 2,853 MHz.
JCSAT-15 is a communications satellite designed and manufactured for SKY Perfect JSAT Group by SSL on the SSL 1300 platform. It has a launch weight of 3,400 kg (7,500 lb), a power production capacity of 10 kW and a 15-year design life. Its payload is composed of Ku band and Ka band transponders.
DSN-2, also known as Kirameki-2, is a geostationary communications satellite to be operated by DSN Corporation, a subsidiary of SKY Perfect JSAT Group. Its payload is a pure X-band and will be used for military communications by the Japanese military. It was launched and successfully deployed on 24 January 2017 using a H-IIA rocket flying in its heaviest configuration, the H-IIA 204. It is Japan's first dedicated military communication satellite and is designed for at least fifteen years of service.
The JSAT constellation is a communication and broadcasting satellite constellation formerly operated by JSAT Corporation and currently by SKY Perfect JSAT Group. It has become the most important commercial constellation in Japan, and fifth in the world. It has practically amalgamated all private satellite operators in Japan, with only B-SAT left as a local competitor.
JCSAT-17 is a geostationary communications satellite operated by SKY Perfect JSAT Group. The satellite was designed and manufactured by Lockheed Martin Space on the LM-2100 platform, and was launched on 18 February 2020 on an Ariane 5. The satellite mainly provides service to Japan and the surrounding regions. Utilizing several S-band transponders with a flexible processor, the satellite has the capability to redirect communications capacity to concentrate on disaster relief efforts or other high-volume events.
DSN Corporation Japanese: 株式会社ディー・エス・エヌ is a corporation owned by SKY Perfect JSAT Group, NEC and NTT Com. It was founded on December 19, 2012 for the sole purpose of acting as an investment vehicle in the private finance initiative that would handle the Japanese military X-band DSN satellite network from 2015 to 2031.
JCSAT-3A, known as JCSAT-10 before launch, is a geostationary communications satellite operated by SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Lockheed Martin on the A2100 platform.
Superbird-2, also identified as Superbird-B after launch if successful, was a geostationary communications satellite designed and manufactured by Ford Aerospace on the SSL 1300 satellite bus. It was originally ordered by Space Communications Corporation (SCC), which later merged into the SKY Perfect JSAT Group. It had a mixed Ku-band, Ka-band and X-band payload and was lost at launch.
Superbird-B1, sometimes identified as Superbird-1B, was a geostationary communications satellite designed and manufactured by Ford Aerospace on the SSL 1300 satellite bus. It was originally ordered by Space Communications Corporation (SCC), which later merged into the SKY Perfect JSAT Group. It had a mixed Ku-band, Ka-band and X-band payload and was rushed into launch at the 162° East longitude due to the launch failure of Superbird-B.
Superbird-A1, also identified as Superbird-1A before launch, was a geostationary communications satellite designed and manufactured by Ford Aerospace on the SSL 1300 satellite bus. It was originally ordered by Space Communications Corporation (SCC), which later merged into the SKY Perfect JSAT Group. It had a mixed Ku-band and Ka-band payload and operated on the 158° East longitude.
N-STAR b, was a geostationary communications satellite originally ordered by a consortium including NTT DoCoMo and JSAT Corporation, and later fully acquired by JSAT, which was merged into SKY Perfect JSAT Group. It was designed and manufactured by Space Systems/Loral on the SSL 1300 platform. It had a launch weight of 3,400 kg (7,500 lb), and a 10-year design life. Its payload is composed of 6 C-band, 11 Ka-band, 8 Ku-band and 1 S-band transponders.
N-STAR c, is a geostationary communications satellite originally ordered by NTT DoCoMo and later fully acquired by SKY Perfect JSAT Group. It was designed and manufactured by Lockheed Martin, which acted as prime, developed the payload and did the final integration and testing, and Orbital Sciences Corporation, which supplied the satellite bus on the GEOStar-2 platform and procured the launch services. It had a launch weight of approximately 1,645 kg (3,627 lb), and a 15-year design life. Its payload is composed of 1 C-band, and 20 S-band transponders and its stationed in the 136° East longitude.
Superbird-B3, known as Superbird-8 before launch, and DSN-1 (Kirameki-1) for its military payload, is a geostationary communications satellite operated by SKY Perfect JSAT Group and designed and manufactured by Mitsubishi Electric on the DS2000 satellite bus.
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