Ascension Island a staging point by the British military during the Falklands War. Ascension Island hosts one of four ground antennas (others are on Kwajalein Island, Diego Garcia, and Cape Canaveral) that assist in the operation of the Global Positioning System (GPS) navigational system. NASA operates a Meter Class Autonomous Telescope (MCAT) on Ascension Island for tracking orbital debris, which is potentially hazardous to operating spacecraft and astronauts, at a facility called the John Africano NASA/AFRL Orbital Debris Observatory. In 1501, the Portuguese navigator Afonso de Albuquerque sighted the island on Ascension Day (which fell on 21 May that year) and named
Afonso de Albuquerque de Menezes. His father held an important position at court and was connected by remote illegitimate descent with the Portuguese monarchy. He was educated in mathematics and Latin at the court of Afonso V of Portugal, where he befriended Prince John, the future King John II of Portugal. Afonso's early training is described by Diogo Barbosa Machado: "“D. Alfonso de Albuquerque, surnamed the Great, by reason of the heroic deeds wherewith he filled Europe with admiration, and Asia with fear and trembling, was born in the year 1453, in the Estate called, for the loveliness of its situation, the Paradise