Engineering:Telkom-2

From HandWiki
Short description: Indonesian communications satellite
Telkom-2
Mission typeCommunications
OperatorPT Telkom
COSPAR ID2005-046A
SATCAT no.28902
Websitehttps://www.telkom.co.id/sites
Mission duration15 years (planned)
15 years, 6 months and 19 days (final)
Spacecraft properties
SpacecraftTelkom-2[1]
Spacecraft typeStar-2
BusGEOStar-2
ManufacturerOrbital Sciences Corporation
Launch mass1,975 kg (4,354 lb)
Dry mass899 kg (1,982 lb)
Dimensions2.4 m x 3.3 m x 1.9 m
Span on orbit: 12.6 m
Power2.918 kW
Start of mission
Launch date16 November 2005,
23:46:00 UTC[2]
RocketAriane 5ECA (V167)
Launch siteCentre Spatial Guyanais, Kourou, ELA-3
ContractorArianespace
Entered serviceJanuary 2006
End of mission
DisposalGraveyard orbit
Deactivated4 June 2021
Orbital parameters
Reference systemGeocentric orbit[3]
RegimeGeostationary orbit
Longitude118° East
157° East
Transponders
Band24 C-band
Coverage areaIndonesia, Southeast Asia, Indian subcontinent
 

Telkom-2 was a geosynchronous communications satellite built by Orbital Sciences Corporation (OSC) for Indonesia's state-owned telecommunications company, PT Telekomunikasi Indonesia Tbk (PT Telkom). Telkom-2 was successfully launched on 16 November 2005, at 23:46:00 UTC and positioned in geostationary orbit, at 118° East for replaced Palapa-B4.

History

Based on Orbital's highly successful and flight-proven STAR-2 satellite bus, Telkom-2 featured state-of-the-art communications satellite technology, and 24 C-band transponders. The new spacecraft replaced PT Telkom's on-orbit Palapa-B4 satellite, improved communications coverage across Indonesia, and allowed PT Telkom to expand its coverage area into southeast Asia and the Indian subcontinent. Orbital also supplemented Telkom's existing ground station, and offered extensive mission operations support. There were several postponements prior to Telkom-2's launch. Three launch delays happened in November 2005 due to technical problems with the Ariane 5 launch vehicle. Multiple delayed took place between November 2004 and October 2005 due to different problems including technical problems with the satellite. Orbital's contract with PT Telkom included an optional order for another geostationary satellite. Telkom-2 was finally launched on 16 November 2005.

Telkom-2 successfully operated for 15 years. The satellite was retired and placed into a graveyard orbit in June 2021.[4][5]

Specification of Telkom-2 satellite:

  • Owner: PT Telkomunikasi Indonesia Tbk (PT Telkom)
  • Mission: C-band communications for Indonesia
  • Performance: Repeater - two groups of 15-for-12 linearized traveling-wave tube assemblies (TWTA)
  • Transponders Power - 39 watts RF
  • Stabilization - three-axis, zero momentum
  • Redundancy: Full dual string
  • Solar arrays: 2 panel wings with improved triple-junction GaAs cells
  • Propulsion: Liquid bi-propellant transfer orbit system; monopropellant (hydrazine) on-orbit
  • Repeater: Two groups of 15-for-12 linear traveling wave tube assemblies (TWTAs)
  • Antenna: Two 2.0 m (6.6 ft) dual-griddled shaped-beam reflectors

Also

References

  1. ↑ "Press Kit". Arianespace. 16 November 2005. https://www.arianespace.com/wp-content/uploads/2017/06/05_nov_16-en.pdf. 
  2. ↑ "Launch Log". Jonathan's Space Page. 14 March 2021. http://planet4589.org/space/log/launchlog.txt. 
  3. ↑ "TELKOM 2". N2YO.com. http://www.n2yo.com/satellite/?s=28902. 
  4. ↑ "Telkomsat Adakan Kick Off De-Orbit Satelit Telkom-2" (in id). Telkom Indonesia. 1 June 2021. https://www.telkomsat.co.id/id/berita/telkomsat-adakan-kick-off-de-orbit-satelit-telkom-2-242. 
  5. ↑ McDowell, Jonathan [@planet4589] (6 July 2021). "The Indonesian TELKOM 2 satellite , built by Orbital (now Northrop Grumman) was launched in 2005 to GEO 118E. It appears to have been retired on Jun 4.". https://twitter.com/planet4589/status/1412646647662776326. 

External links



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