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由于对不同的传感器,单通道算法中的经验公式必须根据相应的热红外波段特征重新进行拟合,该文以覆盖广州市的卫星影像HJ-1B/CCD和HJ-1B/IRS为数据源,利用基于同步面上像元尺度的多源遥感数据MOD021KM,并结合上下行辐射和地表比辐射率来反演大气水汽含量以及大气透射率。在此基础上,针对环境卫星,提出修正的普适性单通道算法、大气辐射传输方程算法和单窗算法3种模型,进行广州市地表温度反演,最后利用野外观测数据进行验证。结果表明,相比普适性单通道算法和单窗算法,辐射传输方程模型精度比较高。
Due to different sensors, the empirical formula in the single-channel algorithm must be re-fitted according to the corresponding characteristics of the thermal infrared band. This paper covers the satellite images HJ-1B / CCD and HJ-1B / IRS in Guangzhou as the data source, Multi-source remote sensing data (MOD021KM) based on pixel size of synchrotron plane are used to invert atmospheric water vapor content and atmospheric transmittance in combination with up-down radiation and surface emissivity. On this basis, for the environmental satellite, a modified universal single-channel algorithm, atmospheric radiation transmission equation algorithm and single-window algorithm are proposed to conduct surface temperature inversion in Guangzhou City. Finally, the field observations are used to verify. The results show that the accuracy of the radiative transfer equation model is higher than the pervasive single-channel algorithm and single-window algorithm.