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地表温度是地球环境中的一个关键参数,可探测地表温度的热红外波段在光谱谱段中占有重要位置。针对近年来发射的HJ-1B星波段特点,本研究在基于影像的COST模型大气校正基础上,以宁夏为研究区,采用无需大气水汽含量参数的单窗算法反演地表温度,并采用同步的MODIS温度产品对比验证,结果表明该法具有<1 K的较高精度。同时,对该法的关键参数地表比辐射率进行了敏感性分析,发现该法对比辐射率不大敏感,其在中等程度的变化时,其误差<0.5 K。从而说明该法反演地表温度的可靠性,也表明了环境减灾星具有较高精度的地表温度探测能力。
Surface temperature is a key parameter in the Earth’s environment. The thermal infrared band that can detect surface temperature plays an important role in the spectral band. In view of the characteristics of the HJ-1B satellite band launched in recent years, based on the atmospheric correction of the COST model based on the image, Ningxia is taken as the research area. The single-window algorithm without atmospheric water vapor content is used to inverse the surface temperature. MODIS temperature product comparison verification, the results show that the method has a higher precision <1K. At the same time, the key parameters of the law of the surface emissivity sensitivity analysis showed that the law is not sensitive to emissivity, its moderate changes, the error <0.5 K. This shows that the method of inversion of surface temperature reliability, but also shows that the environmental reduction star with high accuracy of surface temperature detection capability.