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 with Duarte Fernandes as envoy, and with Timor, passing through Malaysia and Indonesia in a voyage headed by António de Abreu and Francisco Serrão. He also aided diplomatic relations with Ethiopia using priest envoys João Gomes and João Sanches, and established diplomatic ties with Persia, during the Safavid dynasty. He became known as "the Great", "the Terrible", "the Caesar of the East", "the Lion of the Seas", and "the Portuguese Mars". Afonso de Albuquerque was born in 1453 in Alhandra, near Lisbon. He was the second son of Gonçalo de Albuquerque, Lord of Vila Verde dos Francos, and Dona Leonor