COSPAR ID 1997-071A Mission duration 15 years Manufacturer Aérospatiale Inclination 5.08° Period 1 day Launch mass 2,920 kg | SATCAT no. 25049 Bus Spacebus 3000 Power 6,500 watts Inclination 5.08° Launch mass 2,920 kg Launch date 12 November 1997 | |
Similar Eutelsat 4A, Astra 1E, Astra 2A, Astra 2C, Astra 1G | ||
Astra 5A was one of the Astra communications satellites owned and operated by SES at the Astra 31.5°E orbital slot. Launched in 1997 to the 5°E position by NSAB (later SES Sirius, and now a non-autonomous part of SES) as Sirius 2, operation of the satellite was transferred to SES in April 2008 and the craft renamed and moved to 31.5°E to open up a new orbital position for the company for the development of markets in Eastern Europe and the Middle East.
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Astra 5A failed in orbit in 2009.
Market
The Astra 5A satellite provided two broadcast beams, of horizontal and vertical polarisation, across two footprints, called the CEE (Central and Eastern European) beam and the PE (pan-European) beam. The CEE beam provides reception on a 60 cm dish from Poland to northern Turkey, and the Balkans to the Black Sea, while the PE beam extends 60 cm coverage from Tunisia to the Urals and from the Baltic states to Israel.
Countries covered include Armenia, Azerbaijan, Belarus, Bosnia, Bulgaria, Czech Republic, Georgia, Hungary, Iran, Jordan, Macedonia, Moldova, Poland, Romania, Russia, Serbia, Slovakia, Tunisia, Turkey, and Ukraine.
Demise of satellite
On January 16, 2009 Astra 5A "experienced a technical anomaly leading to the end of the spacecraft's mission". All traffic ceased, with much of it (especially channels for German cable service, Kabel Deutschland) transferred to Astra 23.5°E.
Transfer of services to Astra 1D was not practical because this satellite, although effectively co-located with Astra 5A, was in an inclined orbit and usable only for TV contribution services and other intermittent use.
In March 2009, SES announced that in April, the Astra 2C satellite was to be moved from the 28.2° east position to Astra 31.5°E to temporarily take over Astra 5A's mission until Astra 3B was launched to Astra 23.5°E, at which time another craft currently there could be released to 31.5°E. The move of Astra 2C was started in May 2009 and completed on May 11.
In 2010, Astra 3B came into service at Astra 23.5°E and Astra 1G was moved from that position to Astra 31.5°E to take over all broadcasting activity from Astra 2C, which was moved to Astra 19.2°E in September 2010.
In December 2013 it is expected that a new satellite, Astra 5B will be launched to the Astra 31.5°E position to permanently take over all broadcasting from this position.
After the loss of Astra 5A's sun sensors (used to orient towards the sun to charge the craft's batteries) the batteries quickly depleted rendering it impossible to send control information to the satellite. Collisions were a possibility, with Intelsat 802 stated the most probable. In April 2009 SES said that they had managed to regain control of the satellite and that it had been moved out of geostationary orbit, into a higher one, presumably a graveyard orbit.