【摘要】：星上定標系統(tǒng)是衛(wèi)星遙感器的重要組成部分,用于實現(xiàn)儀器的星上輻射定標等功能。介紹了安裝在某一時間調(diào)制型傅里葉變換光譜儀上的星上定標系統(tǒng),該星上定標系統(tǒng)采用漫反射板太陽輻射定標方法進行儀器在軌全口徑、全光路、全視場的星上輻射定標。定標漫反射板在光譜儀光路最前端反射太陽光,通過已知的大氣外太陽照度和漫反射板的雙向反射分布函數(shù)BRDF確立輻亮度標準。定標漫反射板的BRDF需要在實驗室進行精確測量。介紹了在光譜儀整機狀態(tài)下使用太陽模擬器和標準漫反射板進行定標漫反射板實驗室系統(tǒng)級BRDF測量的方法,對使用定標漫反射板系統(tǒng)級BRDF進行星上輻射定標時的絕對輻射定標精度進行了分析,絕對輻射定標精度能夠滿足≤5%的指標要求。
[Abstract]:The onboard calibration system is an important part of the satellite remote sensor. The onboard calibration system installed on a time-modulated Fourier transform spectrometer is introduced. The method of solar radiation calibration with diffuse reflector is used to calibrate the onboard radiation of the instrument in orbit, all optical path and field of view. The calibration diffuse reflectors reflect the solar light at the front end of the spectrometer. The radiance standard is established by the known solar illumination outside the atmosphere and the bidirectional reflectance distribution function (BRDF) of the diffuse reflectors. The BRDF of the calibration diffuse reflector needs to be measured accurately in the laboratory. This paper introduces the method of BRDF measurement in laboratory system using solar simulator and standard diffuse reflector in the whole state of spectrometer. The absolute radiometric calibration accuracy of onboard radiometric calibration using system-level BRDF of calibration diffuse reflector is analyzed. The absolute radiometric calibration accuracy can meet the requirement of 鈮，

本文編號：2244319