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全球定位仪是探险家不可缺少的“法宝”,它象探险家的第二眼睛,能够放眼世界,帮助探险家走出困境,完成探险任务。 全球定位仪是一种利用人造卫星来确定地面上某一点的精确位置(即卫星定位)技术。它由人造地球卫星、地面测控站,便携式定位仪三部分组成。卫星运行在距地面20000km的6条轨道上,每条轨道上均匀地分布着3—4颗卫星,以保证地面上任何地方、任何时刻都能同时观测到4颗卫星。地面站的作用是按时测定卫星的运行位置,随时把测算结果发给卫星。卫星接到
The global locator is an indispensable “magic weapon” for explorers. Like the second eye of an explorer, it can look to the world and help explorers out of trouble to complete their adventures. The Global Positioning Device is a technology that uses satellites to determine the precise location of a point on the ground (ie, satellite positioning). It consists of man-made earth satellites, ground monitoring stations, and portable locators. The satellites operate on 6 orbits at a distance of 20,000 km from the ground. Each orbit is evenly distributed with 3-4 satellites to ensure that 4 satellites can be observed at any time on the ground and at any time. The role of the ground station is to determine the operational position of the satellite on time and send the results to the satellite at any time. Satellite received