5 飞行中监测状况 前面已经指出过,仪器的飞行中性能受到一些因素的影响,这其中包括标准具效应(见图6)、温度、变化着的涂层特性和光具的一般退化。这需要一种精确的飞行中参数监测技术。监测绝对辐射度定标是最难的事实,因为整个仪器都参与了这一过程。在这种情况下,需要一个已经过定标的光源,它可以是一个星载的定标灯, 5 In-flight monitoring As noted earlier, the in-flight performance of the instrument is affected by a number of factors, including the etalon effect (see Figure 6), temperature, changing coating properties, and general deterioration of the light fixture. This requires an accurate in-flight parameter monitoring technique. Monitoring absolute radiometric calibration is the hardest fact, as the entire instrument is involved in this process. In this case, you need a calibrated light source, which can be a spaceborne calibration light,