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 many months earlier, and that his reversed decision had been delivered many months too late. After 51 years, in 1566, his body was moved to Nossa Senhora da Graça church in Lisbon, which was ruined and rebuilt after the 1755 Great Lisbon earthquake. King Manuel I of Portugal was belatedly convinced of Afonso's loyalty, and endeavoured to atone for his lack of confidence in Afonso by heaping honours upon his son, Brás de Albuquerque (1500–1580), whom he renamed "Afonso" in memory of the father. Afonso de Albuquerque was a prolific writer, having sent numerous letters to the king during his