目前美国陆地卫星、极地气象,海洋卫星以及世界气象组织安排的地球同步卫星发射以来,世界各国十分重视遥感技术从1957年到1978年间一共从地球上发射约一万零六百多个人造卫星和飞行器,环绕着地球、太阳、月球及其它行星运行着。目前空间轨道上飞行的约有4600多个。有神通广大的侦察卫星,有空中烽火台—导弹予警卫星。有空间战前锋—拦击卫 At present, since the launches of the United States terrestrial satellite, the polar meteorology, the marine satellite and the geosynchronous satellite arranged by the World Meteorological Organization, all countries in the world attach great importance to the remote sensing technology. A total of about 10,600 man-made satellites were launched from the earth from 1957 to 1978 and The aircraft, circling the Earth, the sun, the moon and other planets. There are currently about 4,600 orbits in space orbit. There are supernatural reconnaissance satellites, air beacon towers - missiles to the police satellite. Space war front - blocking guard