 A CGI impression of Skynet 5D in orbit | |
| Mission type | Military communications |
|---|---|
| Operator | Astrium Services On behalf of British Ministry of Defence |
| COSPAR ID | 2012-075A  |
| SATCAT no. | 39034 |
| Mission duration | 15 years |
| Spacecraft properties | |
| Bus | Eurostar 3000S |
| Manufacturer | Astrium |
| Launch mass | 4,800 kilograms (10,600 lb) |
| Start of mission | |
| Launch date | 19 December 2012, 21:49 (2012-12-19UTC21:49Z) UTC |
| Rocket | Ariane 5ECA VA211 |
| Launch site | Kourou ELA-3 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 53° East |
Skynet 5D is a military communications satellite operated by Airbus Defence and Space on behalf of the British Ministry of Defence. It was the last of four Skynet 5 satellites to be launched.
Spacecraft
The Skynet 5D spacecraft was constructed by Astrium, based on the Eurostar 3000S satellite bus. It had a mass at launch of approximately 4,800 kilograms (10,600 lb), and is designed to operate for at least 15 years. Its 34-metre (112 ft) solar arrays will generate a minimum of 6 kilowatts to power its UHF and X-band communications systems. The satellite's payload includes jamming countermeasures.
The Ministry of Defence described the satellite as having a "key role in gathering intelligence on operations", as well as communications.
Launch
Skynet 5D was launched by an Ariane 5ECA carrier rocket flying from ELA-3 at Kourou. The launch occurred at 21:49 UTC on 19 December 2012. Skynet 5D was one of two satellites aboard the rocket, the other being Mexsat Bicentenario, which was located below it; Skynet 5D was mounted atop a Sylda 5 adaptor.
Orbit
The launch placed Skynet 5D into a geosynchronous transfer orbit, from which was planned to raise itself into geostationary orbit. The spacecraft was expected to be placed at a longitude of 25 degrees East.
References
- Krebs, Gunter. "Skynet 5A, 5B, 5C, 5D". Gunter's Space Page. Retrieved 21 December 2012.
- ^ "A Satellite Launch for the British MoD and Mexico" (PDF). Arianespace. Archived from the original (PDF) on 8 November 2013. Retrieved 21 December 2012.
- "Skynet-5D: Military satellite's classified tech". BBC News. 19 December 2012. Retrieved 21 December 2012.
- "Sky's the Limit for New Military Satellite - Paradigm Agrees Deal with UK Ministry of Defence (MoD) for Fourth Skynet 5 Satellite". Ministry of Defence & EADS Astrium (Press release). defense-aerospace.com. 9 March 2010. Retrieved 5 April 2020.
- ^ Bergin, Chris (19 December 2012). "Ariane 5 ECA launches Skynet 5D and Mexsat 3/Bicentenario". NASASpaceflight.com. Retrieved 21 December 2012.
| Skynet satellites | |
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| Skynet 1 | |
| Skynet 2 | |
| Skynet 4 | |
| Skynet 5 | |
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| Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses). | |
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