红外与毫米波学报2012，Vol.31Issue(6)：523-527,5.DOI:10.3724/SP.J.1010.2012.00523
云二号卫星水汽波段在轨辐射定标新方法
On-orbit radiometric calibration for water-vapor band of FY-2 satellite
摘要
Abstract
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.关键词
月球观测/在轨定标/水汽波段/UDERKey words
lunar observation/on-orbit calibration/ water-vapor band/UDER分类
天文与地球科学引用本文复制引用
郭强,陈博洋,杨昌军,冯绚..云二号卫星水汽波段在轨辐射定标新方法[J].红外与毫米波学报,2012,31(6):523-527,5.基金项目
国家自然科学基金(40971200,41075019) （40971200,41075019）
