基于相干植被模型和ASAR数据的玉米地后向散射特征研究

APPLICATION A COHERENT VEGETATION BACKSCATTERING MODEL TO CORN FIELD AND COMPARISON WITH ENVISAT ASAR DATA

在微波一阶相干散射模型的基础上提出了针对玉米作物的相干散射模型,模型中使用物理光学(PO)和无限长介电圆柱体近似方法计算玉米叶片和秆的单散射体矩阵,并在模型中考虑了不同散射机制之间相互作用所产生的相干分量.使用吉林省公主岭地区玉米地部分生长周期内的实测数据和同步获取的多角度、多时相的先进合成孔径雷达(ASAR)图像数据对该模型进行了验证,并初步分析了误差产生的原因.

The Michigan grassland coherent model was modified for the corn fields. The coherence effect between various scattering mechanisms was considered. Six multi-temporal and multi-angle ASAR images （C band, HH and HV）, over the Gongzhuling flat agriculture area in the Jilin province, China, were acquired during the growing season. ASAR observations were compared with the coherent model, with a detailed analysis of the errors involved.