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遥感是传感器不直接与目标物接触而能收集其资料的一种过程。它是通过测量目标物的反射或辐射电磁波来收集信息的。人有眼睛和大脑,是当今最复杂的遥感系统。眼睛是传感器,躯体是平台;神经是传播的发射机;大脑则是处理资料和提取信息的计算机。现代遥感技术是多种类型的传感器组成;这些传感器比人眼强得多,可以探测电磁波谱中各种波段,而眼睛所能感受的可见光,仅仅是电磁波谱中一扇狭窄的窗户。电磁波谱就是用波的形式以光速传播的能谱。这种辐射的连续波谱有几个波段,其中
Remote sensing is a process by which sensors can collect data without direct contact with the target. It collects information by measuring the reflected or radiated electromagnetic waves of the target. People have eyes and brain, is today’s most complex remote sensing system. The eye is a sensor, the body is a platform; nerves are transmitters of transmitters; and the brain is a computer that processes data and extracts information. Modern remote sensing technology is composed of many types of sensors; these sensors are much stronger than the human eye and can detect various bands in the electromagnetic spectrum. The visible light that the eye can feel is only a narrow window in the electromagnetic spectrum. Electromagnetic spectrum is the form of wave propagation at the speed of light spectrum. The continuous spectrum of this radiation has several bands, of which