Astra 2C

Astra 2C is one of the Astra communications satellites owned and operated by SES. Designed to join Astra 2A and Astra 2B at the Astra 28.2°E orbital slot providing digital television and radio broadcast services to the UK and Republic of Ireland, the satellite was first used after launch in 2001 at 19.2°E for pan-European coverage.

Astra 2C
Mission typeCommunication
OperatorSES Astra
SES S.A.
COSPAR ID2001-025A
SATCAT no.26853
Mission duration15 years
Spacecraft properties
BusBSS 601 HP
ManufacturerBoeing Satellite Systems
Launch mass3,643 kilograms (8,031 lb)
Power7,000 W
Start of mission
Launch date16 June 2001, 01:49:00 (2001-06-16UTC01:49Z) UTC
RocketProton-K/DM3
Launch siteBaikonur 81/23
ContractorILS
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
SlotAstra 23.5°E (2018-)
60.2° East (2015-2018)
Astra 28.2°E (2014-2015)
Astra 19.2°E (2010-2014)
Astra 31.5°E (2009-2010)
Astra 28.2°E (2007-2009)
Astra 19.2°E (2001-2007)
Perigee altitude35,781 kilometres (22,233 mi)[1]
Apogee altitude35,807 kilometres (22,249 mi)[1]
Inclination1.1 degrees[1]
Period1,436.1 minutes[1]
EpochMay 27, 2018, 11:20:38 UTC[1]
Transponders
Band32 Ku band
(to be reduced to 28 by end of life)
Bandwidth33 MHz
Coverage areaUnited Kingdom
Ireland
TWTA power105 W
EIRP51 dBW
 

The satellite provides one broadcast beam with horizontal and vertical polarisation, across a single footprint covering the areas of Central and Eastern Europe, Scandinavia, the Iberian peninsula and Canary Islands.[2]

TV signals can be received with a 50 cm dish across the majority of the British Isles with a 60 cm dish required in the extreme north and west. Astra 2C can also provide backup capacity, substituting for one or more transponders across the 10.70 GHz-12.20 GHz broadcast range used by Astra satellites in the Astra 19.2°E and Astra 28.2°E orbital positions.

History

Although originally intended for Astra 28.2°E, the satellite has spent little of its life in that orbital position, stationed at Astra 19.2°E and Astra 31.5°E for some 11 years for pan-European coverage (see below). Positioned at 28.2°E for just 19 months from August 2007 and for 16 months from March 2014, Astra 2C was then moved to 60.5°E in August 2015[3] In April-May 2018 it was moved for the first time to the Astra 23.5°E slot.[4]

Temporary use at 19.2°E

Astra 2C was first positioned at 19.2°E after launch in 2001, to provide pan-European capacity at the primary Astra position pending the launch of Astra 1L (in May 2007) and was moved to 28.2°E in August 2007, transmitting digital TV and interactive services for Sky Digital and Freesat.[5] Only two transponders were active during this time.

The satellite was returned to 19.2°E in September 2010 while Astra 1N, which was intended for positioning at Astra 19.2°E, was used at Astra 28.2°E. As of July 2012, there are 16 transponders active, in particular six for the Spanish Canal+ pay-TV platform and five for Sky Deutschland.[6]

Astra 2C was returned to its originally intended position at Astra 28.2°E after the relocation of Astra 1N from 28.2°E to 19.2°E in March 2014.

Temporary use at 31.5°E

In March 2009, SES announced that in April, Astra 2C was to be moved from 28.2° east to Astra 31.5°E to temporarily replace the failed Astra 5A until Astra 3B was launched to Astra 23.5°E, when another craft currently there could be released to Astra 31.5°E.[7] The move of Astra 2C was started in early May 2009 and completed on 11 May,[8] with the first transponders coming into use at the new position in the subsequent two weeks.

In June 2010, Astra 3B (launched May 2010) came into operation at Astra 23.5°E and Astra 1G was moved from that position to Astra 31.5°E, where it could release take over all broadcasting activity from Astra 2C. Astra 2C left 31.5°E in September 2010.

See also

References
  1. "ASTRA 2C Satellite details 2001-025A NORAD 26853". N2YO. 27 May 2018. Retrieved 27 May 2018.
  2. "Astra 2C". SES. Archived from the original on 25 January 2012. Retrieved 26 January 2012.
  3. "Astra 2C at 60.5°E". LyngSat. Retrieved 27 September 2015.
  4. Real Time Satellite Tracking And Predictions Accessed May 27, 2017
  5. "Astra 2C at 28.2°E". LyngSat. Archived from the original on 11 August 2008. Retrieved 12 August 2008.
  6. "Astra 2C at 19.2°E". LyngSat. Retrieved 24 July 2012.
  7. "SES To Move ASTRA 2C Satellite To 31.5 Degrees East To Support Development Of New Orbital Position" (Press release). SES Astra. 10 March 2009. Retrieved 26 January 2012.
  8. Astra 2C arrived at 31.5 East. LyngSat. Retrieved 1 June 2009
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