论文部分内容阅读
全球定位系统(GPS)作为国防部(DoD)的项目建立后已将近25年,第一颗GPS卫星发射升空距今也已18年了,卫星星座已全能力运营一年多,在比原定截止日期推迟了若干月后的今天,白宫发布了有关GPS的政策声明。由于GPS技术既可用于军事目的,又可
Nearly 25 years after the Global Positioning System (GPS) was established as a DoD project, the first GPS satellite has been launched for as long as 18 years ago. The satellite constellation has been in full operation for more than a year, The deadline has been postponed for some months today, the White House released a policy statement on GPS. As GPS technology can be used for military purposes, but also