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一、遥感信息机制如前所述,遥感信息是依靠电磁波传递的。自然界中凡是温度大于绝对温度(-273.16℃)的任何物体,都存在着分子热运动。带电粒子不停地发生能级跃迁,同时放出或吸收能量。物体的温度不同,结构不同,放出和吸收的能量也不同。因此,任何物体都以特定的波长辐射电磁波能量,产生与物体特征相关的不同波长的电磁波谱信号,通过与传感器的相互作用被记录下来。对于地物的反射辐射能量,理论公式为:对于地物的发射辐射能量,则可表为:
First, the remote sensing information mechanism As mentioned earlier, remote sensing information is transmitted by electromagnetic waves. There is molecular thermal motion in any object in nature that has a temperature greater than the absolute temperature (-273.16 ° C). Charged particles constantly undergo energy transitions while releasing or absorbing energy. Objects of different temperatures, different structures, release and absorption of energy is also different. Therefore, any object radiates electromagnetic wave energy at a specific wavelength to generate electromagnetic wave signals of different wavelengths related to the characteristics of the object and is recorded through interaction with the sensor. For the reflection of terrestrial radiation energy, the theoretical formula is: For the emission of ground radiation energy, can be expressed as: