RADIATION CALIBRATION METHOD OF EARTH RADIATI ON MEASUREMENT NONSCANNER

Earth radiation measurement (ERM) nonscanner, which includes a total-wave channel and a short-wave channel, is a new type of remote sensing instrument in our country. There is an activity cavity detector in each of these channels. ERM nonscanner is used to stare the earth and measures the earth radiation budget from the low orbit satellite and its field of view covers with the edge of the earth. Being a quantification remote sensor, ERM needs a high precision radiant calibration standard. The method of radiant calibration standard trader was proposed after considering the design of the instrument. At first, the totalwave active cavity detector was calibrated by a blackbody. Then, the totalwave active cavity was used to measure an integrating sphere source. At the end, the calibrated integrating sphere source was used to calibrate the short-wave active cavity detector. This method could enhance the calibration accuracy of ERM nonscanner short-wave channel.