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提出地表微波极化差异指数,并利用AMSR-E星载被动微波遥感亮温数据,统计分析了2002-2006年7月上旬新疆微波极化差异指数旬平均分布;通过计算归一化距平,反演得到新疆7月上旬土壤湿度动态变化分布图。结果表明:利用微波极化差异指数能够较好地表征土壤湿度时空异常变化,为定量监测土壤相对干湿程度提供了一种有效便捷的方法。
The difference index of surface microwave polarization was put forward and the average temperature difference data of microwave polarization of AMSR-E was used to analyze the ten-day average distribution of difference index of microwave polarization in Xinjiang in the first ten days of July 2002-2006. By calculating the normalized anomaly, Inversion was made in Xinjiang in early July the dynamic changes in soil moisture distribution map. The results show that the use of microwave polarization difference index can better characterize the spatial and temporal variations of soil moisture, and provide an effective and convenient method for quantitatively monitoring the relative dry and wet levels of soil.