Skynet 5D

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Skynet 5D
Skynet 5D in orbit, CGI.jpg
A CGI impression of Skynet 5D in orbit
Mission typeMilitary communications
Operator Astrium Services
On behalf of British Ministry of Defence
COSPAR ID 2012-075A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 39034 OOjs UI icon edit-ltr-progressive.svg
Mission duration15 years
Spacecraft properties
Bus Eurostar 3000S
Manufacturer Astrium
Launch mass4,800 kilograms (10,600 lb)
Start of mission
Launch date19 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
Longitude53° 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.

Contents

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. [1] Its 34-metre (112 ft) solar arrays will generate a minimum of 6 kilowatts [2] to power its UHF and X-band communications systems. The satellite's payload includes jamming countermeasures. [3]

The Ministry of Defence described the satellite as having a "key role in gathering intelligence on operations", as well as communications. [4]

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. [5] 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. [2]

Orbit

The launch placed Skynet 5D into a geosynchronous transfer orbit, from which was planned to raise itself into geostationary orbit. [5] The spacecraft was expected to be placed at a longitude of 25 degrees East. [2]

References

  1. ↑ Krebs, Gunter. "Skynet 5A, 5B, 5C, 5D". Gunter's Space Page. Retrieved 21 December 2012.
  2. 1 2 3 "A Satellite Launch for the British MoD and Mexico" (PDF). Arianespace. Archived from the original (PDF) on 8 November 2013. Retrieved 21 December 2012.
  3. ↑ "Skynet-5D: Military satellite's classified tech". BBC News. 19 December 2012. Retrieved 21 December 2012.
  4. ↑ "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.
  5. 1 2 Bergin, Chris (19 December 2012). "Ariane 5 ECA launches Skynet 5D and Mexsat 3/Bicentenario". NASASpaceflight.com. Retrieved 21 December 2012.


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