尽管人类用卫星从空间观测地球还不到二十年,但空间科学技术的发展已经引起军事侦察、资源勘测、环境监测、气象观测以及地图测绘等领域的彻底改革。从空间观测地球是将遥感仪器安装在空间飞行器(人造卫星、宇宙飞船等)上进行的。照相机是最普通、最广泛使用的可见光、近红外光谱段成象仪器。照相机可以有多种接收元件,如感光胶片、介质带、超正折摄象管,返束光导管和电荷耦合器件等。近年来,各种扫描器 Although it has not been twenty years since humans used satellites to observe the Earth from space, the development of space science and technology has led to radical reforms in the areas of military reconnaissance, resource surveys, environmental monitoring, meteorological observation and mapping. Observations from Space The Earth was made by installing remote sensing instruments on space vehicles (satellites, spacecraft, etc.). Cameras are the most common and widely used visible and near-infrared spectral imaging devices. The camera can have a wide variety of receiving elements such as photographic film, media tapes, over-center photodiodes, return lightguides, and charge-coupled devices. In recent years, various scanners