The U.S. Navy began replacing and upgrading its ultra-high frequency (UHF) satellite communications network during the 1990s with a constellation of customized satellites built by Hughes Space and Communications Company. Known as the UFO (Ultra High Frequency Follow On) series, these HS-601 model satellites support the Navy's global communications network, serving ships at sea and a variety of other U.S. military fixed and mobile terminals.
Geostationary OrbitHispasat 1A and B were the first two satellites in the national system operated by the Spanish satellite communications operator Hispasat, for a dual civil/military mission, offering services to telecommunications operators and radio broadcasting both in Europe and North Africa and America. Hispasat 1A was launched in September 1992, and Hispasat 1B in July 1993. From its orbital position of 30 degrees West above the Atlantic and close to the Brazilian coast, this was the first European satellite system to provide transatlantic capacity, simultaneously covering all the Latin American countries and the United States, areas that have a great deal in common both culturally and linguistically.
Geostationary Orbit