BETA ZEN
GPS satellite blocks
Texto da Wikipédia (en), licença CC BY-SA. O BETARUBI mostra o verbete inteiro nesta página — a leitura não continua fora do site.
GPS satellite blocks are the various production generations of the Global Positioning System (GPS) used for satellite navigation. The first satellite in the system, Navstar 1, was launched by the United States Air Force on 22 February 1978. The GPS satellite constellation is now operated by the 2nd Navigation Warfare Squadron of Mission Delta 31, United States Space Force.