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Paksat-1

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Paksat-1,[2] (Other former designation as Palapa-C1, HGS-3 and Anatolia-1), was a geosynchronous and communications satellite built and owned by the Boeing Company, leased to the Space & Upper Atmosphere Research Commission (SUPARCO) and renamed Paksat-1. It was successfully put on orbit on 1 February 1996 as Palapa-C1 for Indonesia as its original customer. But, after the technical problems, the satellite was leased to SUPARCO at an orbital location of 38° East longitude in December 2002. Paksat-1 offers the C-band and Ku-band coverage in over 75 countries across Europe, Africa, Middle East, South and Central Asia. Its customers included government organizations, television broadcasters, telecommunications companies, data and broadband internet service providers.

Paksat-1
NamesPalapa-C1
HGS-3
Anatolia-1
Mission typeCommunications
OperatorSATELINDO (1996-1998)
Insurers (1998-1999)
Hughes Space and Communications (1999-2011) and leased to:
Kalitel (2000-2002)
SUPARCO (2002-2011)
COSPAR ID1996-006A Edit this at Wikidata
SATCAT no.23779
Websitehttps://indosatooredoo.com/
Mission duration15 years (planned)
15 years (achieved)
Spacecraft properties
SpacecraftPaksat-1
Spacecraft typeBoeing 601
BusHS-601
ManufacturerHughes Space and Communications Company
Launch mass3,000 kg (6,600 lb)
Dry mass1,740 kg (3,840 lb)
DimensionsSpan: 21 m (69 ft)
Power3730 watts
Start of mission
Launch date1 February 1996, 01:15:01 UTC
RocketAtlas IIAS (AC-126)
Launch siteCape Canaveral, LC-36B
ContractorLockheed Martin
Entered service20 December 2002
End of mission
DisposalGraveyard orbit
Deactivated2011
Orbital parameters
Reference systemGeocentric orbit[1]
RegimeGeostationary orbit
Longitude113° East (1996-1998)
38° East (2002-2016)
Transponders
Band34 transponders:
30 C-band
4 Ku-band
Bandwidth36 MHz (C-band),
72 MHz (Ku-band)
Coverage areaPakistan, Europe, Africa, Middle East, South Asia, Central Asia
 

History edit

Palapa-C1 edit

PT Satelit Palapa Indonesia (SATELINDO) chose Hughes in April 1993. It was built by Hughes Space and Communications Company for Indonesian telecommunications provider PT Satelit Palapa Indonesia (SATELINDO).[3] It was based on the HS-601 satellite bus. Construction was done at El Segundo, California. Hughes also augmented the new master control station at Daan Mogot City near Jakarta. It had 30 C-band transponders and 4 Ku-band transponders. It was due to be located in geosynchronous orbit at 113° East above the equator.[3]

Launch edit

Palapa-C1 was launched by a Atlas IIAS launch vehicle on 1 February 1996 at 01:15:01 UTC.[4] The satellites were launched from Cape Canaveral in Florida.[4] The liquid apogee engine of the satellite then raises it to geostationary orbit.[5]

Later Indonesia declared the satellite unusable after an electric power anomaly. The insurance claims were paid and the title was transferred to Hughes Space and Communications Company,[6] and renamed HGS-3, and was then acquired by Pakistan from Hughes Global Services on "Full Time Leasing" and relocated to Pakistan's reserved orbital position at 38° East.

HGS-3 edit

Hughes Global Services purchased the satellite and renamed HGS-3.[5]

Anatolia-1 edit

The satellite was renamed Anatolia-1.[5]

Paksat-1 edit

Pakistan's government approved the acquisition on 3 July 2002[7] and the leasing with Hughes Global Services was agreed on 6 August 2002.[8] The satellite started moving to its new orbital position on 5 December 2002 [9] and it went through a name change from Anatolia-1 to Paksat-1 on 18 December 2002.[10] After a series of orbital maneuvers, the satellite was stabilized at its final location on 20 December 2002 with 0° inclination. The satellite is in position at the Pakistani-licensed orbital location, 38° East longitude. The satellite was acquired for a cost of around five million dollars.[11]

Mission edit

The services include satellite communications in both C-band and Ku-band to customers in Pakistan, Africa and the Middle East. Paksat-1's 30 C-band transponders and 4 Ku-band transponders provide total range of satellite communication capabilities.

Payload characteristics edit

30 C-band transponders and 4 Ku-band transponders provide the total range of satellite communications capabilities. The satellite is in a geostationary orbit at 38° East Longitude, and carries high power payloads in both bands.

Payload characteristics of PAKSAT-1 are as below:

C-Band Payload Characteristics
Number of transponders 24 in standard C-band
6 in extended C-band
Redundancy All redundancy available
Channel bandwidth 36 MHz
Uplink frequency band 5925 MHz – 6665 MHz
Downlink frequency band 3400 MHz – 4200 MHz
Beams Southern regions
Northern regions
Beam connectivity All transponders can be switched independently to downlink in the southern beam. Many transponders can downlink in the northern beam. All transponders can be switched independently to uplink from either beam
Polarization Linear crosspol
EIRP (at peak of beam) 38 dBW
G/T (at peak of beam) +2 dB/K
Ku-band Payload Characteristics
Number of transponders 4
Redundancy All redundancy available
Channel bandwidth 72 MHz
Uplink frequency band 13754 MHz – 14486 MHz
Downlink frequency band 10954 MHz – 11686 MHz
Beams Southern regions, Northern regions
Beam connectivity All transponders can be switched independently to uplink or downlink in either beam
Polarization Linear colpol
EIRP (at peak of beam) 52 dBW
G/T (at peak of beam) +5 dB/K

Applications edit

  • Internet backbone extension
  • Point-to-point data services
  • Remote Internet access
  • Broadcast services (video and data)
  • Business VSAT networks
  • Direct-to-home
  • Thin route telephony support
  • Shipboard communications

Channels edit

Paksat footprints edit

Paksat-1 has two beams each in both C-band and Ku-bands, i.e. C1, C2 and K1, K2, respectively. In C-band, C1 (Southern Beam) covers mainly African Continent and Middle East. The C2 (Northern Beam) covers South Asia, Middle East, African Continent, Central Asian States and Southern Europe. In Ku-band, K1 (Southern Beam) covers mainly Middle East and Eastern Africa. K2 (Northern Beam) covers South Asia, Middle East and Central Asian States.

C1 - Southern Beam EIRP Contours C1 - Southern Beam G/T Contours
C2 - Northern Beam EIRP Contours C2 - Northern Beam G/T Contours
K1 - Southern Beam EIRP Contours K1 - Southern Beam G/T Contours
K2- Northern Beam EIRP Contours K2- Northern Beam G/T Contours

Future projects edit

Telesat, one of the world's leading satellite operators, announced on 13 March 2007, that it had signed a consulting contract with the Space and Upper Atmosphere Research Commission (SUPARCO), Pakistan's national space agency. Under the agreement, Telesat will assist SUPARCO in the procurement and launch of the Paksat-1R satellite, which will replace the existing Paksat-1 in 2010.[12]

References edit

  1. ^ "SatCat". Jonathan's Space Page. Retrieved 1 May 2021.
  2. ^ "Pakistan's Space Programme". Dr. Mohmmad Riaz Suddle, Director of the Paksat-1R programme and current executive member of the Suparco's plan and research division. SUPARCO Media Research Directorate. 19 December 2009. Archived from the original on 10 January 2011. Retrieved 11 August 2011.
  3. ^ a b "Display: PALAPA-C1 1996-006A". NASA. 28 October 2021. Retrieved 8 November 2021.   This article incorporates text from this source, which is in the public domain.
  4. ^ a b "Launch Log". Jonathan's Space Report. 21 July 2021. Retrieved 8 November 2021.
  5. ^ a b c "Palapa-C1 / HGS-3 / Anatolia-1 / Paksat-1". Gunter's Space Page. 11 December 2017. Retrieved 8 November 2021.
  6. ^ "Palapa-C1, -C2 / HGS-3 / Anatolia-1 / Paksat-1". Gunter's Space Page. 11 December 2017. Retrieved 1 May 2021.
  7. ^ "Pak opts to buy 'defective satellite' to cut costs". Times of India. 5 July 2002. Retrieved 7 January 2023.
  8. ^ "Hughes Global Services to Provide Satellite to Pakistan -- re> EL SEGUNDO, Calif., Aug. 6 /PRNewswire/ --". m.prnewswire.com. Archived from the original on 24 June 2013. Retrieved 3 February 2022.
  9. ^ "Daily Times - Site Edition". Archived from the original on 19 May 2006. Retrieved 23 June 2013.
  10. ^ "Transponder Monitor". Satellite Today. 18 December 2002. Retrieved 7 January 2023.
  11. ^ Siddiqui, Salman (1 August 2012). "Lagging behind: 2040 - Pakistan's space od[d]yssey". The Express Tribune. Retrieved 1 May 2021.
  12. ^ "Paksat-1R". Archived from the original on 16 July 2011. Retrieved 18 April 2011.

External links edit

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