JCSAT-1B
JCSAT-1B, known as JCSAT-5 before launch, is a geostationary communications satellite operated by SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Hughes (now Boeing) on the HS-601 satellite bus. It has a pure Ku-band payload and was used to replace JCSAT-1 at the 150° East longitude. It covers Japan, Korea, most of China, Thailand, Vietnam, Laos, part of Indonesia, part of Malaysia and Hawaii.[2][3][4]
| Names | JCSAT-5 (Jun 1996 to Dec 1997) JCSAT-1B (Dec 1997 onward) |
|---|---|
| Mission type | Communications |
| Operator | SKY Perfect JSAT Group |
| COSPAR ID | 1997-075A [1] |
| SATCAT no. | 25067 |
| Website | http://www.jsat.net/en/contour/jcsat-1b.html |
| Mission duration | 12 years (planned) |
| Spacecraft properties | |
| Spacecraft | JCSAT-5 |
| Spacecraft type | JCSAT |
| Bus | HS-601 |
| Manufacturer | Hughes |
| Launch mass | 2,982 kg (6,574 lb) |
| Dry mass | 1,308 kg (2,884 lb) |
| Dimensions | 26.1 m × 7.6 m (86 ft × 25 ft) with solar panels and antennas deployed |
| Power | 5 kW |
| Start of mission | |
| Launch date | 2 December 1997, 22:52:32 UTC [1] |
| Rocket | Ariane 44P |
| Launch site | Centre Spatial Guyanais, ELA-2 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 150° East |
| Transponders | |
| Band | Ku-band: 16 × 36 Mhz + 16 × 27 MHz |
| Bandwidth | 1008 MHz |
| Coverage area | Japan, East Asia, South Asia, Australia, Hawaii |
| TWTA power | 12 × 36 MHz 95 watts 4 × 36 MHz 60 watts 16 × 27 MHz 60 watts |
Satellite description edit
The spacecraft was designed and manufactured by Boeing Satellite Development Center on the HS-601 satellite bus. It had a launch mass of 2,982 kg (6,574 lb) and a 12-year design life. Its solar panels span 21 m (69 ft) when fully deployed and generated approximately 5 kW of power, with its antennas in fully extended configuration it is 7.6 m (25 ft) wide.[4] It would provide communications services throughout Japan, East Asia, South Asia, Australia and Hawaii.[2]
Its payload is composed of sixteen 36 MHz plus another sixteen 27 MHz Ku-band transponders, for a total bandwidth of 1008 MHz.[5] Its twelve of the 36 MHz transponders have a TWTA output power of 95 watts, the other four 36 MHz and the 27 MHz ones have 60 watts.[4][2] It can configure four 36 MHz transponders into two 76 MHz with an effective 95 watts.[2]
The Ku-band footprint covers Japan, Korea, most of China, Thailand, Vietnam, Laos, part of Indonesia, part of Malaysia and Hawaii.[4]
History edit
In June 1996, JSAT (since then merged into SKY Perfect JSAT Group) ordered JCSAT-5 from Hughes Space and Communications Company (now Boeing Satellite Development Center), to replace JCSAT-1 at the 150° East slot. The HS-601 based satellite would provide coverage to Japan, East Asia, Australia and Hawaii.[2]
An Ariane 44P successfully launched JCSAT-5 on 2 December 1997 at 22:52:32 UTC from Centre Spatial Guyanais ELA-2 launch pad. Once successfully deployed, it was renamed as JCSAT-1B. It was driven to the 150° East position where it replaced JCSAT-1.[2]
The satellite experienced an anomaly on 17 January 2007 on one of its thrusters. But after the operator designed a control scheme to handle the satellite without the failed thruster, it was put back into service.[2]
References edit
- ^ a b "Display: JCSAT 5 1997-075A". NASA. 10 February 2021. Retrieved 20 March 2021. This article incorporates text from this source, which is in the public domain.
- ^ a b c d e f g Krebs, Gunter (21 April 2016). "JCSat 5, 6 (JCSat 1B, 4A)". Gunter's Space Page. Retrieved 20 July 2016.
- ^ "JCSat 1B (JCSat 5)". Satbeams. Retrieved 26 July 2016.
- ^ a b c d . SKY Perfect JSAT. Archived from the original on 18 August 2016. Retrieved 9 August 2016.
- ^ "Who we are?". SKY Perfect JSAT. 3 August 2012. Retrieved 2 August 2016.