Linear and circular polarization P band SAR tomography for tropical forest biomass study
Linear and circular polarization P band SAR tomography for tropical forest biomass study
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发表时间：
2012-04
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通讯作者：
H. T. M. Dinh;F. Rocca;S. Tebaldini;M. M. d'Alessandro-M.;T. Toan
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作者：
H. T. M. Dinh;F. Rocca;S. Tebaldini;M. M. d'Alessandro-M.;T. Toan
本文旨在研究P波段合成孔径雷达层析成像在估计热带雨林生物量的潜力。这里介绍的分析是以国家环境研究局在欧空局TropiSAR活动框架内在法属圭亚那Paracou和Nourages试验场获得的多基线数据为基础的。有利的基线分布，这一数据集的结果在层析垂直分辨率约为20米，而森林高度范围从20到40米。这些功能的结果在地图上的后向散射功率的垂直分布在大约三个独立的层的可能性，而无需假设任何先验模型的森林。对于这两个测试点，与体积层（约30米以上的地面）的后向散射功率观察到表现出最高的敏感性，森林生物量，即使是高生物量值（250-500吨/公顷）。此外，该结果似乎松散地依赖于所采用的偏振，因为在线偏振和圆偏振中观察到类似的行为。
This paper aims at investigating the potential of P-Band SAR tomography in estimating biomass in tropical rain forests. The analysis here presented is based on multi-baseline data acquired by ONERA at the test sites of Paracou and Nourages, French Guyana, in the frame of the ESA campaign TropiSAR. The favorable baseline distribution of this data set results in a tomographic vertical resolution of about 20 m, whereas forest height ranges from 20 to 40 m. These features result in the possibility to map the vertical distribution of the backscattered power in about three independent layers, without assuming any a-priori model of the forest. For both test-sites, the backscattered power associated with the volume layer (about 30 m above the ground) is observed to exhibit the highest sensitivity to forest biomass, even for high biomass values (250-500 t/ha). Furthermore, this result appears to be loosely dependent on the employed polarization, as a similar behavior is observed in both linear and circular polarization.