Cách hoạt động của hệ thống định vị GPS
GPS là hệ thống định vị toàn cầu được thiết kế, xây dựng, vận hành và quản lý bởi Bộ Quốc phòng Mỹ. Một số chức năng của GPS được cấp phép sử dụng miễn phí trên toàn thế giới.
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