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- 2017
HUT模型的改进及其雪深反演
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Abstract:
基于风云-3B（FY-3B）卫星的微波成像仪（MWRI）数据对HUT模型（Helsinki university of technology snow emission model）进行验证，结果表明，无论是18.7 GHz还是36.5 GHz水平极化亮温，HUT模型模拟亮温都与MWRI亮温存在较大的偏差。因此，本文对消光系数进行了本地化改进，得到了改进的HUT模型（IMPHUT模型）。IMPHUT模型在18.7 GHz水平极化和36.5 GHz水平极化时的模拟亮温偏差分别为-0.91 K和-4.19 K，较原始的HUT模型模拟精度（偏差分别为14.03 K和-16.33 K）有很大提高。最后，利用遗传算法进行雪深反演，基于IMPHUT模型的雪深反演（偏差为-6.79 cm）优于HUT模型和Chang算法，反演与实测雪深具有较好的一致性
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