See also
- JCSAT-5A – Also known as N-STAR d, was the follow on satellite.
| Mission type | Mobile communications |
|---|---|
| Operator | SKY Perfect JSAT Group |
| COSPAR ID | 2002-035B [1] |
| SATCAT no. | 27461 |
| Mission duration | 15 years (planned) |
| Spacecraft properties | |
| Spacecraft | N-STAR c |
| Bus | GEOStar-2 |
| Manufacturer | Lockheed Martin / Orbital Sciences Corporation |
| Launch mass | 1,645 kg (3,627 lb) |
| Dimensions | 3.3 m × 1.9 m × 1.5 m (10.8 ft × 6.2 ft × 4.9 ft) (stowed) |
| Power | 2.6 kW |
| Start of mission | |
| Launch date | 5 July 2002, 23:22:00 UTC [1] |
| Rocket | Ariane 5G (V153) |
| Launch site | Centre Spatial Guyanais, ELA-3 |
| Contractor | Arianespace |
| Entered service | August 2002 |
| Orbital parameters | |
| Reference system | Geocentric orbit [2] |
| Regime | Geostationary orbit |
| Longitude | 136° East [3] |
| Transponders | |
| Band | 1 C-band 20 S-band [4] |
| Coverage area | Japan |
N-STAR c, is a geostationary communications satellite originally ordered by NTT DoCoMo and later fully acquired by SKY Perfect JSAT Group. [5] [6] 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. [4] It had a launch weight of approximately 1,645 kg (3,627 lb), and a 15-year design life. [4] [7] Its payload is composed of 1 C-band, and 20 S-band transponders and its stationed in the 136° East longitude. [8] [9]
N-STAR c is a 3 axis stabilized geostationary communications satellite based on the GEOStar-2 satellite bus. While its payload was developed by Lockheed Martin, who also did final integration, the satellite bus was supplied by Orbital Sciences Corporation (now Lockheed Martin). N-STAR c was the first order for the GEOStar-2 (then called STAR-2) platform, and Orbital Sciences supplied it fully integrated and tested to Lockheed Martin. [10]
It weighed 1,645 kg (3,627 lb) at launch, and while the design life was of 15 years. [7] Stowed for launch it measured 3.3 m × 1.9 m × 1.5 m (10.8 ft × 6.2 ft × 4.9 ft). [11] It had a power availability dedicated to the payload of 1.4 kW, thanks to its multi-junction GaAs solar cells that produced 2.6 kW at the beginning of its operative life and spanned 12.6 m (41 ft) when deployed. [11] [7] The satellite used a bipropellant propulsion system for orbit circularization, station keeping and attitude control, with enough propellant for 15 years. [7]
Its payload was designed and manufactured by Lokheed Martin. It is composed of an unfurlable 5.1 m (17 ft) antenna fed by 20 S-band and 1 C-band transponders. With the S-band part supplying end user mobile communication services and the C-band acting as the feeder channel. The S-band transponders have a solid-state amplifiers power of 288 watts. It is arranged in three groups of four plus one spare amplifiers of 24 watts each. [7] The transponders work on the 2.5 GHz to 2.6 GHz frequency. [12] The C-band transponder is powered by one plus one spare 13 watts solid state amplifier and works on the 4 GHz and 6 GHz frequency band. [7] [12] [13]
N-Star was created as a joint venture between JSAT Corporation, Nippon Telegraph and Telephone (NTT), NTT Communications and NTT DoCoMo for the supply of these latter two WIDESTAR satellite telephone and data packet service. [14] JSAT would handle the satellite side of business and NTT DoCoMo would operate the payload. [15] [16]
In October 1999, N-STAR c was ordered by NTT DoCoMo from Lockheed Martin and Orbital Sciences Corporation. [10] Orbital Sciences would supply the spacecraft and procure launch services and Lockheed Martin would deliver the payload an act a main contractor. [4] It was the first satellite ordered to use the GEOStar-2 satellite bus from Orbital Sciences. [10]
On 5 July 2002 at 23:22:00 UTC and Ariane 5G successfully launched N-STAR c along Stellat 5. [1] On 12 September 2002, Orbital Sciences announced the successful on-orbit delivery of N-STAR c to its client, NTT DoCoMo, during late August 2002. [17]
During 2010, SKY Perfect JSAT Corporation acquires N-STAR c, completing the transfer of NTT orbital assets and management to JSAT. [6] The same year the WIDESTAR II service was enabled for all of Japan, using N-STAR c and JCSAT-5A, also known as N-STAR d. [13]
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.
JCSAT-11, was a geostationary communications satellite ordered by JSAT Corporation which was designed and manufactured by Lockheed Martin on the A2100 platform. The satellite was designated to be used as an on-orbit, but was lost on launch failure.
Horizons Satellite is a joint venture between Intelsat and SKY Perfect JSAT Group. Originally formed in 2001, pursuant to a memorandum of understanding between JSAT Corporation and PanAmSat for the launch of Horizons-1, it was renewed for Horizons-2. JSAT later merged into the SKY Perfect JSAT Group and PanAmSat was acquired by Intelsat, but the companies continued with the relationship, with the order for Horizons-3e. Both companies also launched a joint satellite, Intelsat 15/JCSAT-85, but instead of the equal share agreement of this joint venture, JSAT owns a specific payload of 5 transponders out of the 22 Ku band transponders of the spacecraft.
The Broadcasting Satellite System Corporation (B-SAT) is a Japanese corporation established in April 1993 to procure, manage and lease transponders on communications satellites. Its largest stockholder, owning 49.9%, is NHK, the Japan Broadcasting Corporation. In 1994, it was ranked by Space News as the world's 19th largest fixed satellite operator.
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.
JCSAT-RA, previously known as JCSAT-12, is a Japanese geostationary communications satellite, which is operated by SKY Perfect JSAT Group.
JCSAT-110, also known as N-SAT 110, JCSAT-7, Superbird-5 and Superbird-D, is a Japanese geostationary communications satellite which was operated by JSAT Corporation and Space Communications Corporation until both companies merged into SKY Perfect JSAT Group in 2008. It is positioned in geostationary orbit at a longitude of 110° East, from where it is used to provide communications services to Japan.
Intelsat 15, also known as IS-15, is a communications satellite owned by Intelsat. Intelsat 15 was built by Orbital Sciences Corporation, on a Star-2.4. It is located at 85° E longitude on the geostationary orbit. It was launched from Baikonur Cosmodrome to a geosynchronous transfer orbit on 30 November 2009 by a Zenit-3SLB launch vehicle. It has 22 active Ku band transponders, plus eight spares. Five of those transponders are owned and operated by SKY Perfect JSAT Group under the name JCSAT-85.
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.
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.
JCSAT-3 was a geostationary communications satellite designed and manufactured by Hughes on the HS-601 satellite bus. It was originally ordered by JSAT Corporation, which later merged into the SKY Perfect JSAT Group. It has a mixed Ku-band and C-band payload and operated on the 128° East longitude until it was replaced by JCSAT-3A.
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. 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 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.
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