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星载红外遥感仪器辐射定标的任务是用标准黑体模拟地球目标的辐射。用遥感仪器输出信号过渡,校准仪器内部参考黑体的实测温度与等效黑体温度间的偏差,建立目标黑体温度T_目和内部参考黑体温度T_参。 T_目、T_参的变化范围分别为320～200K和45～-5℃。定标时,先固定T_参,改变T_目(从320～200K),得到一条定标曲线,再将T_参固定在另一温度,重复以上过程,即得到一组实用辐射定标曲线。红外遥感仪器的输出有码速率为665.4kbit/s的HRPT串行数字信号及带宽为1.6kC的APT模拟信号两种。每个温度定标点需测量512个数据,整个定标需测1.75×10~5个数据。我们建立了由四台CMC-80单板计算机和一台TRS-80Ⅱ微型计算机组成的
The mission of radiation calibration of satellite-borne infrared remote sensing instruments is to simulate the radiation of the Earth’s target with a standard blackbody. The remote sensing instrument output signal transition, calibration instrument internal reference blackbody measured temperature and the deviation between the equivalent blackbody temperature, the establishment of the target blackbody temperature T_head and the internal reference blackbody temperature T_ parameter. T_ head, T_ parameter range of 320 ~ 200K and 45 ~ -5 ℃. When calibrating, fix T_parameters and change T_members (from 320 ~ 200K) to obtain a calibration curve, and then set T_parameter to another temperature. After repeating the above process, a set of practical radiation calibration curve. The output of infrared remote sensing instruments are HRPT serial digital signal with code rate of 665.4kbit / s and APT analog signal with bandwidth of 1.6kC. Each temperature calibration point to be measured 512 data, the entire calibration to be measured 1.75 × 10 ~ 5 data. We built a four-CMC-80 single board computer and a TRS-80II microcomputer