Inmarsat-5
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| Inmarsat-5 | |
|---|---|
| Name | Inmarsat-5 |
| Operator | Inmarsat |
| Bus | Boeing 702 |
| Launch | December 8, 2013 (F1), February 1, 2015 (F2), August 28, 2015 (F3), May 15, 2017 (F4) |
| Rocket | Proton-M (F1, F2, F3), Falcon 9 (F4) |
| Launchsite | Baikonur Cosmodrome (F1, F2, F3), Kennedy Space Center (F4) |
Inmarsat-5 is a series of four communications satellites operated by Inmarsat, a leading provider of global mobile satellite communications services, in partnership with Boeing, Lockheed Martin, and Thales Alenia Space. The Inmarsat-5 series is designed to provide high-speed mobile broadband communications services to aeronautical, maritime, and land-mobile users worldwide, leveraging the expertise of NASA, European Space Agency, and Russian Federal Space Agency. The development of the Inmarsat-5 series involved collaboration with various organizations, including MIT Lincoln Laboratory, Jet Propulsion Laboratory, and European Organisation for the Exploitation of Meteorological Satellites. The satellites are built on the Boeing 702 platform, which has been used for numerous other satellites, including Intelsat 14, DirecTV-12, and EchoStar XV.
Introduction
The Inmarsat-5 series is a significant upgrade to Inmarsat's existing satellite constellation, which includes Inmarsat-4 and Inmarsat-3 satellites, and provides global coverage in partnership with Intelsat, SES S.A., and Eutelsat. The new series offers higher capacity, faster data rates, and improved performance, enabling a wide range of applications, including broadband access, video transmission, and telemedicine, in collaboration with Cisco Systems, Microsoft, and IBM. The Inmarsat-5 satellites are designed to operate in the Ka-band frequency range, which provides higher bandwidth and faster data rates than traditional C-band and Ku-band frequencies, and are compatible with GaN-based amplifiers developed by Northrop Grumman and Raytheon Technologies. The development of the Inmarsat-5 series involved significant investment and collaboration with various organizations, including University of California, Berkeley, California Institute of Technology, and Massachusetts Institute of Technology.
Spacecraft Design
The Inmarsat-5 satellites are built on the Boeing 702 platform, which provides a high-power and high-capacity spacecraft design, similar to Intelsat 22 and SES-6. The satellites have a launch mass of approximately 6,100 kilograms and are equipped with two solar arrays and a lithium-ion battery to provide power, using technology developed by Space Systems/Loral and Ball Aerospace. The spacecraft design includes a propulsion system using xenon gas and a station-keeping system to maintain the satellite's position and orbit, similar to Inmarsat-4A F3 and Inmarsat-4A F4. The Inmarsat-5 satellites are designed to operate for at least 15 years, with a potential extension of up to 18 years, and are built to withstand the harsh conditions of space, including radiation and extreme temperatures, in collaboration with NASA Goddard Space Flight Center and European Space Agency.
Launch and Orbit
The Inmarsat-5 satellites were launched on Proton-M rockets from the Baikonur Cosmodrome in Kazakhstan, with the exception of the fourth satellite, which was launched on a Falcon 9 rocket from the Kennedy Space Center in Florida, using launch services provided by International Launch Services and SpaceX. The satellites were placed into a geostationary orbit at an altitude of approximately 36,000 kilometers, where they will operate for their entire mission, in partnership with Arianespace and United Launch Alliance. The launch and orbit of the Inmarsat-5 satellites involved significant planning and coordination with various organizations, including Russian Federal Space Agency, European Space Agency, and NASA, and were supported by Telespazio and SES S.A..
Communications Payload
The Inmarsat-5 satellites are equipped with a high-capacity communications payload, which includes 89 Ka-band transponders and 6 steerable beams, providing global coverage and high-speed data rates of up to 50 Mbps, using technology developed by Thales Alenia Space and Northrop Grumman. The payload is designed to provide a wide range of services, including broadband access, video transmission, and telephony, in collaboration with Cisco Systems, Microsoft, and IBM. The Inmarsat-5 satellites also feature a digital channelizer and a beam-hopping system, which enable the efficient use of bandwidth and provide high flexibility in terms of service provisioning, similar to Intelsat 29e and SES-12. The communications payload of the Inmarsat-5 satellites was developed in partnership with University of California, Los Angeles, Stanford University, and Carnegie Mellon University.
Operations and Services
The Inmarsat-5 satellites provide a wide range of services, including broadband access, video transmission, and telephony, to aeronautical, maritime, and land-mobile users worldwide, in partnership with Singapore Airlines, Qantas, and Carnival Corporation. The satellites operate in conjunction with Inmarsat's existing satellite constellation, which includes Inmarsat-4 and Inmarsat-3 satellites, and provide global coverage in partnership with Intelsat, SES S.A., and Eutelsat. The Inmarsat-5 satellites are designed to support a wide range of applications, including telemedicine, emergency response, and remote monitoring, in collaboration with Red Cross, United Nations, and World Health Organization. The operations and services of the Inmarsat-5 satellites involve significant collaboration with various organizations, including NASA, European Space Agency, and Russian Federal Space Agency.
Satellite Constellation
The Inmarsat-5 series is part of Inmarsat's global satellite constellation, which provides coverage of the entire globe, including oceans, landmasses, and polar regions, in partnership with Intelsat, SES S.A., and Eutelsat. The constellation includes a total of 14 satellites, including the Inmarsat-5 series, Inmarsat-4 and Inmarsat-3 satellites, and provides a wide range of services, including broadband access, video transmission, and telephony, to aeronautical, maritime, and land-mobile users worldwide, in collaboration with Singapore Airlines, Qantas, and Carnival Corporation. The Inmarsat-5 satellites are designed to operate in conjunction with other satellites in the constellation, including Inmarsat-6 and Inmarsat-7, to provide seamless and continuous coverage, using technology developed by Thales Alenia Space and Northrop Grumman. The satellite constellation of Inmarsat involves significant collaboration with various organizations, including University of California, Berkeley, California Institute of Technology, and Massachusetts Institute of Technology.