摘要
本文利用粗糙度参数的定标公式以lopt2代替相关长度L,通过AIEM模型模拟后向散射系数,得到后向散射系数与均方根高度和土壤水分的经验关系,以交叉极化差σ0vh-σ0vv来表示均方根高度,建立土壤水分反演的反演模型.经18个实测数据验证,发现实测值与反演值的相关系数为0.9096,均值误差为0.088.说明该模型有较好的反演精度,可以用于土壤水分反演.
In this paper, we set up the inversion model of soil moisture, by the calibration formula of roughness parameter, correlation length L replaced by lopa, the experience relationship between backscattering coefficient and RMS height, soil moisture achieved according to the backscattering system simulated by AIEM model, RMS height replaced by the cross polarization difference σvh0-σvv0. According to the verification of 18 measured data, the correlation coefficient of measured and inversion value is 0. 9096, the mean error 0. 088. The inversion accuracy of model is good, which can be used in the inversion of soil moisture.
出处
《云南地质》
2016年第1期114-117,共4页
Yunnan Geology
