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| Lockheed Martin A2100 | |
|---|---|
| Name | A2100 |
| Manufacturer | Lockheed Martin |
| Country | United States |
| Status | Active |
Lockheed Martin A2100 The Lockheed Martin A2100 is a modular satellite bus developed for commercial and government satellite applications. Designed by Lockheed Martin Space Systems engineers, it evolved from earlier platforms used by Intelsat, PanAmSat, and Eutelsat customers and later supported missions for NASA, United States DOD, and international operators. The architecture emphasizes standardized subsystems for power, attitude control, and propulsion to reduce cost and schedule risk for operators such as SES S.A., Thales Alenia Space, and Sky Perfect JSAT.
Development of the A2100 began in the mid-1990s within Lockheed Martin Space Systems following the consolidation of space activities at sites including Palo Alto and facilities in Denver. The design lineage traces to buses used on Intelsat VI and Anik-series programs and leveraged avionics practices from Titan IV and Atlas II launch integrations. Program milestones included qualification tests at Goddard Space Flight Center test facilities, thermal vacuum campaigns patterned after procedures from JPL missions, and acceptance flights in partnership with launch providers such as Arianespace, United Launch Alliance, and International Launch Services.
The A2100 bus features a modular structure with a central composite payload deck and service module derived from heritage designs employed on GOES and Landsat buses. The electrical power subsystem uses deployable solar arrays with triple-junction solar cell technology developed in conjunction with suppliers used on Hubble Space Telescope upgrades and is paired with nickel-hydrogen or lithium-ion battery systems similar to those qualified for GPS and Iridium spacecraft. Attitude control employs reaction wheels, star trackers, and inertial measurement units influenced by hardware used on GeoEye and QuickBird, while propulsion commonly uses bipropellant thrusters with hydrazine and MON systems akin to those on Weather satellite platforms. Thermal control integrates radiators and louvers tested in thermal vacuum campaigns comparable to James Webb Space Telescope component testing.
Key specifications vary by variant but typical parameters include geostationary transfer capabilities for large communications payloads, payload power budget ranges similar to Inmarsat and DirecTV spacecraft, and bus mass compatible with payload accommodations on Ariane 5 and Proton-M launch vehicles. Avionics leverage radiation-hardened processors and fault-management software informed by designs used on Mars Reconnaissance Orbiter and Voyager heritage systems.
Several A2100 derivatives were produced to meet diverse mission profiles. Commercial communications variants were delivered to operators such as Intelsat, Eutelsat, SES S.A., Telesat, and Hispasat. Government and military derivatives supported programs for USAF, DARPA, and NASA observational or relay missions. Performance-tuned versions included high-power electric propulsion adaptations reflecting trends adopted by Boeing and Airbus Defence and Space in later bus designs, and condensed smallsat adaptations comparable to offerings from SSL and OHB System AG.
Operational deployments of the A2100 began with early customer satellites launched in coordination with Arianespace and International Launch Services manifest schedules. The bus has supported prominent fleet expansions for DirecTV and EchoStar as well as regional operators like AsiaSat and ABS. A2100 spacecraft have been involved in in-orbit incidents and anomaly investigations using procedures akin to those from ESA anomaly review boards and industry best practices from NASA lessons learned. Over time, upgrades to on-orbit operations integrated ground segment practices used by SES Astra and Eutelsat for station-keeping and payload reconfiguration.
The A2100 has been applied to fixed satellite service payloads, mobile communications platforms, and high-throughput architectures similar to those deployed by Viasat and Eutelsat Hot Bird. It also served as a platform for hosted payloads and technology demonstrations for entities such as NOAA, NASA Goddard, and research programs collaborating with Caltech and MIT laboratories. The bus accommodated Ku-band, Ka-band, C-band, and hybrid transponder suites used by operators like Telenor and Sky Perfect JSAT and supported payloads requiring precise pointing and thermal stability comparable to observation satellites from Planet Labs and Spire Global.
A2100 operators include major commercial satellite fleet owners and government agencies: Intelsat, EchoStar, DirecTV, SES S.A., Eutelsat, Telesat, AsiaSat, ABS, Inmarsat, and national agencies such as NOAA and the United States DOD. Manufacturing and integration partners have included Thales Alenia Space, Ball Aerospace, Honeywell, and component suppliers engaged by Lockheed Martin across domestic and international supply chains.
A2100 satellites have launched aboard vehicles operated by Arianespace, United Launch Alliance, International Launch Services, and commercial providers, with performance metrics assessed via telemetry linked to ground stations operated by SES Ground Stations and operator networks. Mission lifetimes largely met or exceeded contractual design lives, with on-orbit retirements handled in accordance with guidelines from ITU coordination practices and end-of-life disposal conventions similar to those endorsed by IADC. Notable successes include extended station-keeping durations consistent with fuel budgets and payload availability records reported by corporate operator archives.
Category:Lockheed Martin spacecraft Category:Satellite buses