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 and greatly feared yet greatly loved by all, a quality rarely found united in one captain. He was very valiant and favoured by fortune." In 1572, Afonso's feats were described in "The Lusiads", the Portuguese main epic poem by Luís Vaz de Camões (Canto X, strophes 40–49). The poet praises his achievements, but has the muses frown upon the harsh rule of his men, of whom Camões was almost a contemporary fellow. In 1934, Afonso was celebrated by Fernando Pessoa in "Mensagem", a symbolist epic. In the first part of this work, called "Brasão" (Coat-of-Arms), he relates Portuguese historical protagonists