【摘要】：星上定標(biāo)系統(tǒng)是衛(wèi)星遙感器的重要組成部分,用于實(shí)現(xiàn)儀器的星上輻射定標(biāo)等功能。介紹了安裝在某一時(shí)間調(diào)制型傅里葉變換光譜儀上的星上定標(biāo)系統(tǒng),該星上定標(biāo)系統(tǒng)采用漫反射板太陽(yáng)輻射定標(biāo)方法進(jìn)行儀器在軌全口徑、全光路、全視場(chǎng)的星上輻射定標(biāo)。定標(biāo)漫反射板在光譜儀光路最前端反射太陽(yáng)光,通過已知的大氣外太陽(yáng)照度和漫反射板的雙向反射分布函數(shù)BRDF確立輻亮度標(biāo)準(zhǔn)。定標(biāo)漫反射板的BRDF需要在實(shí)驗(yàn)室進(jìn)行精確測(cè)量。介紹了在光譜儀整機(jī)狀態(tài)下使用太陽(yáng)模擬器和標(biāo)準(zhǔn)漫反射板進(jìn)行定標(biāo)漫反射板實(shí)驗(yàn)室系統(tǒng)級(jí)BRDF測(cè)量的方法,對(duì)使用定標(biāo)漫反射板系統(tǒng)級(jí)BRDF進(jìn)行星上輻射定標(biāo)時(shí)的絕對(duì)輻射定標(biāo)精度進(jìn)行了分析,絕對(duì)輻射定標(biāo)精度能夠滿足≤5%的指標(biāo)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(hào)：2244319