中文摘要：

将月球作为热发射波段定标参考源,在无需月表发射率和温度信息条件下,通过引入UDER参数,建立了不同热发射波段观测辐亮度间定量关系,并导出了新的波段间交叉定标方法.同时,利用FY-2E卫星多波段月球观测结果,以辐射精度较高的热红外波段为基准,在无星载全光路黑体情况下,初步实现了水汽波段在轨高精度辐射定标,且在200～220 K低温区间内的定标精度平均提高约3.5 K,并显著改善了云分类等定量产品的性能.

英文摘要：

With the Moon as a reference source for thermal emissive band（TEB） calibration without any knowledge of lunar surface＇s emissivity or temperature,the quantitative relationship of the measured radiances between different TEBs is established by introducing the parameter universal dual-band emissivity ratio（UDER）.This was further used to deduce a novel cross-calibration approach between different bands.Meanwhile,selecting the thermal infrared band with the highest radiometric accuracy as a baseline,the on-orbit radiometric calibration for water-vapor band of FY-2E satellite is realized by using multi-bands lunar observations without any space-borne full-path blackbody.The radiometric calibration accuracy has been improved by about 3.5 K in the lower temperature region between 200K and 220 K,which is great benefits to the enhancement of some quantitative products significantly,i.e.cloud classification.