遥感系统定标的常用方法见图1。主要有二:(1)相对和绝对定标;(2)系统静态宏图象响应和动态微图象响应。本文仅涉及绝对定标和仅考虑静态宏图象响应。绝对定标法可分三类(见图1右下角)。(1)系统的绝对定标仅在发射前进行。飞行中用辐射定标源通过光学系统照射焦面以检查定标,此法缺点是不能检测出由于释气污染物沉积所造成的传感器系统成象光学元件透过率的变化,并假定发射过程中星载定标系统是稳定的,未受轨道高度环境下真空、高能粒子 A common method of calibration of remote sensing systems is shown in Figure 1. There are mainly two: (1) relative and absolute calibration; (2) system static macro image response and dynamic micro image response. This article deals only with absolute scaling and only with static macro image responses. Absolute calibration method can be divided into three categories (see Figure 1 lower right corner). (1) Absolute calibration of the system is performed only before launch. In flight, calibration of radiation is performed by irradiating a focal plane with a radiation source through an optical system. The disadvantage of this method is that no change in the transmittance of the imaging optical element of the sensor system due to outgassing of contaminants can be detected, and the emission process In the satellite calibration system is stable, not under the track height of vacuum, high energy particles