Tags: Artificialsatellite, Satellite.
Inmarsat-3 F4 is a communications satellite operated by the British satellite operator Inmarsat. It was launched into a geosynchronous orbit on June 4 1997. It is currently located at 54° West longitude providing coverage of the Americas.Inmarsat-3 F4 was constructed by Lockheed-Martin using an AS-4000 bus. It has a mass of 2068 kilograms and is expected to operate for 13 years.In the United States Inmarsat ground stations are licensed to operate at 1525-1559 MHz and 1626.5-1660.5 MHz.