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文中在考虑环境一号B星(HJ-1B)热红外波段(infrared scanner,IRS4)光谱响应函数和有效波长的基础上,通过MODTRAN4模型模拟,对Jimenez-Munoz和Sobrino(JM&S)单通道算法中的大气函数进行改进,重新计算得到了适合HJ-1B星IRS4地表温度(land surface temperature,LST)反演的3个大气函数公式,并反演了福州地区的地表温度.采用基于星上辐亮度法对反演的地表温度进行精度评价,并将反演的地表温度与JM&S算法、段四波等修正的JM&S算法反演的地表温度进行对比分析.结果表明:使用文中改进后的大气参数对HJ-1B星IRS4进行地表温度反演,可取得较好结果.
Based on the spectral response function and effective wavelength of the infrared scanner (IRS4) of HJ-1B and the simulation of MODTRAN4 model, in the single channel algorithm of Jimenez-Munoz and Sobrino (JM & S) The atmospheric functions of the HJ-1B satellite IRS4 are retrieved by the recalculation of three atmospheric function formulas, and the surface temperature in Fuzhou area is inverted.Using the radiance Method is used to evaluate the surface temperature of the inversion and the surface temperature of the inversion is compared with the surface temperature retrieved by the JM & S algorithm and the modified JM & S algorithm.The results show that using the improved atmospheric parameters HJ-1B satellite IRS4 surface temperature inversion, can get better results.