Sensitivity of bistatic scattering to soil moisture and surface roughness of bare soils
Sensitivity of bistatic scattering to soil moisture and surface roughness of bare soils
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DOI：
10.1080/01431160903232808
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发表时间：
2010-05
影响因子：
3.4
通讯作者：
M. Brogioni;S. Pettinato;G. Macelloni;S. Paloscia;P. Pampaloni;N. Pierdicca;F. Ticconi
中科院分区：
文献类型：
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作者：
M. Brogioni;S. Pettinato;G. Macelloni;S. Paloscia;P. Pampaloni;N. Pierdicca;F. Ticconi
利用改进的积分方程模型（AIEM）和二阶微扰模型（SPM）对非相干散射场进行了数值模拟，研究了双站散射系数σ°对土壤含水量（SMC）和地表粗糙度的敏感性。通过模拟整个上半空间上的散射进行研究，对于不同的入射角值。通过考虑粗糙度对SMC测量的影响的质量指数来评估所获得的结果，所述结果表示为作为方位角和天顶角的函数的σ°图。灵敏度分析指出，对于测量SMC，双基地观测，本身或与单基地观测相结合，可以使相对于经典的单基地雷达有明显的改进。附录A包含针对特定文献中存在的几个印刷错误进行纠正的AIEM公式。
The sensitivity of bistatic scattering coefficient σ° to soil moisture content (SMC) and surface roughness was investigated by means of model simulations of the incoherent scattered fields performed with the advanced integral equation model (AIEM) and the second order small perturbation model (SPM). The study was performed by simulating scattering on the whole upper half space, for different values of incident angles. The achieved results, represented as maps of σ° as a function of azimuth and zenith angles, were evaluated by means of a quality index which takes into consideration the effect of roughness on SMC measurement. The sensitivity analysis has pointed out that for measuring SMC a bistatic observation, by itself or combined with the monostatic one, can make appreciable improvements with respect to classical monostatic radar. Appendix A contains the AIEM formulas corrected for several typographical errors present in the specific literature.