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Lockheed Martin A2100

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The A2100 is a communications satellite spacecraft model made by Lockheed Martin Space Systems in the 1990s-2010s for telecommunications in geosynchronous orbit, as well as GOES-R weather satellites and GPS Block IIIA satellites.[1] [2]

The Lockheed Martin A2100 geosynchronous spacecraft series is designed for a variety of telecommunications needs including Ka band broadband and broadcast services, fixed satellite services in C-band and Ku band payload configurations, high-power direct broadcast services using the Ku band frequency spectrum, and mobile satellite services using UHF, L-band and S-band payloads.[3]

The A2100 satellite system was developed by a Skunk Works[citation needed] team at the Astro Space East Windsor, New Jersey facility, with team members delivering a flexible common bus with fewer components, lower spacecraft weight, and reduced customer delivery time.[4]

The first satellite, AMC-1, was launched September 8, 1996, and has achieved 15-year on-orbit service life.[5] Since 1996 there have been over 45 of the A2100 based satellites launched, with over 400 years of total on-orbit service.[6] Other A2100 spacecraft include JCSAT-13 and VINASAT-2, which were launched May, 2012 on an Ariane 5 rocket. [7] The two most recent A2100 satellites are Arabsat-6A and Hellas Sat 4/SaudiGeoSat-1 of Saudi Arabia's Arabsat-6G program.[8]

In 2002 Lockheed Martin Commercial Space Systems was given a Frost and Sullivan Satellite Reliability Award for excellence in the production of flexible and reliable communications satellites used in geosynchronous Earth orbit.[9]

A2100 customers includes communications companies around the world, including Astra, Telesat, SKY Perfect JSAT Group and others.

Propulsion systemEdit

The attitude control system includes reaction wheels,[10] with momentum desaturation and main motor maneuver attitude control propulsion provided by small monopropellant hydrazine motors. This hydrazine supply is contained in a central propellant tank of 0.90 m diameter and up to 2.00 m length depending on the customer's requirements.[11] This tank's maximum length was later increased to 2.55 m.[12] The liquid apogee engine uses hydrazine fuel from the central tank along with nitrogen tetroxide oxidizer from two flanking tanks of 0.54 m diameter and up to 1.65 m long.[13] Orbit maintenance is performed by the small hydrazine motors and ion thrusters.[14] The maximum propellant supply (with the largest tanks at 95% fill factor) are 1368 kg of hydrazine fuel and 627 kg of nitrogen tetroxide oxidizer.

According to Moog-ISP, the A2100 platform uses its LEROS bipropellant Liquid Apogee Engine.[15]

ReferencesEdit

  1. ^ Kline, Allan (3 June 1997). "Lockheed Links Up with Intersputnik in Space". Washington Times  – via Questia (subscription required). Retrieved 12 November 2013.
  2. ^ "Lockheed Martin: A2100"
  3. ^ "Lockheed Martin: A2100" Archived 2013-09-30 at the Wayback Machine
  4. ^ "A2100 History"
  5. ^ "First Lockheed Martin-Built A2100 Communications Satellite Marks 15 Years of On-Orbit Operations". Defense & Aerospace Week  – via HighBeam (subscription required). September 21, 2011. Archived from the original on June 10, 2014. Retrieved November 12, 2013.
  6. ^ "Lockheed Martin-Built A2100 Satellites: Over 400 Cumulative Years In Orbit And Counting"
  7. ^ "Ariane 5 ECA launches JCSAT-13 and VINASAT-2 into orbit"
  8. ^ Lockheed Martin Completes Assembly on Arabsat's Newest Communications Satellite. Lockheed Martin. 20 February 2018.
  9. ^ "Frost & Sullivan Award
  10. ^ "Global Positioning System III overview and contractors"
  11. ^ "ATK SSI P/N 80395-1 Datasheet"
  12. ^ "ATK SSI P/N 80443-1
  13. ^ "ATK SSI P/N 80405-1 Datasheet"
  14. ^ "Lockheed Martin-Built A2100 Satellites: Over 400 Cumulative Years In Orbit And Counting"
  15. ^ "Thrusters". Moog Inc. Retrieved 2016-08-09.