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随着现代科学技术的发展,特别是现代通讯技术、计算技术以及宇航技术的新成就,遥感技术应世而生,它从最早的也是最典型的航空摄影技术、雷达测距技术发展到空间的电磁扫描、热红外成像扫描、电子扫描。特别是近20多年来,遥感技术的发展已经处于迅猛发展的程度,得到了林业、农业、地质、水资源、军事及工程等有关部门的高度重视。自一九五七年苏联发射第一颗人造卫星以来,很多国家都在研制、发射这种卫星,为了科学试验我国也发射了许多卫星。目前在空间运行的卫星有近二千颗,其中有军事侦察卫星、
With the development of modern science and technology, especially the new achievements of modern communication technology, computing technology and aerospace technology, remote sensing technology emerges from the earliest and the most typical aerial photography technology and radar ranging technology to space Electromagnetic scanning, thermal infrared imaging scanning, electronic scanning. Especially in the past two decades or so, the development of remote sensing technology has been at a rapid development level, and the relevant departments such as forestry, agriculture, geology, water resources, military affairs and engineering attach great importance. Since the Soviet Union launched its first satellite in 1957, many countries are developing and launching such satellites. Many satellites have also been launched in our country for scientific experiments. There are nearly 2,000 satellites currently operating in space, including military reconnaissance satellites,