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测绘学报  2014 

极化干涉SAR植被高反演复数最小二乘平差法

DOI: 10.13485/j.cnki.11-2089.2014.0170, PP. 1061-1067

Keywords: 极化干涉SAR,树高反演,复数最小二乘平差,时间去相干

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Abstract:

提出一种PolInSAR植被高反演的复数最小二乘法。在考虑植被层时间去相干的条件下,将RVoG扩展为RVoG+VTD模型;之后,将模型解算问题概括为复数的实部、虚部联合平差问题,提出了该模型线性化的方法及参数解算方法;最后利用解算得到的更为准确的“纯”体去相干系数反演植被高度。采用覆盖德国Oberpfaffenhofen地区的2景E-SARL波段数据进行试验并与经典的非线性迭代及三阶段算法进行对比分析。结果表明,本文提出的方法结果精度优于其他两种方法,运算效率方面明显优于非线性迭代算法,略低于三阶段算法。

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