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SAR Coherence Tomography for Boreal Forest with Aid of Laser Measurements

机译：北方林辅助激光测量的SAR相容性断层扫描

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In this paper we evaluate X- and L-band SAR coherence tomography in boreal forest with the help of detailed digital terrain and canopy height models, produced by laser scanning. Polarimetric coherence tomography (PCT) needs accurate estimates of ground phase and tree height. Supplemental accurate elevation models allow us to evaluate the performance of PCT in normal case when initial values are derived from RVoG model inversion and provides opportunity to use PCT for nonpolarimetric data. The work is based on E-SAR L-band and X-band measurements in Finland. Our results show that with accurate elevation and tree height information single polarization X-band coherence tomography is feasible and works well. Accurate ground elevation information improves also the performance of fully polarimetric repeat pass L-band PCT. The laser DEM provides better ground phase estimate than RVoG model inversion in the presence of temporal decorrelation. Our results show that accurate ground phase estimation is more critical for successful coherence tomography than other parameters.
机译：在本文中，我们通过激光扫描产生的详细数字地形和冠层高度模型，评估北方林中的X-和L频段SAR相干性断层扫描。 Polariemetric相干断层扫描（PCT）需要准确的地面阶段和树高的估计。补充准确的高度模型允许我们在初始值源自Rvog模型反转时评估PCT在正常情况下的性能，并为使用PCT进行非极化数据而提供机会。这项工作基于芬兰的E-SAR L波段和X波段测量。我们的结果表明，随着精确的高度和树高信息，单极化X波段相干断层扫描是可行的，效果良好。准确的地面高程信息还可以改善完全偏振重复通过L波段PCT的性能。激光DEM在存在时间去相关性的情况下提供比Rvog模型反转更好的地面阶段估计。我们的结果表明，对于成功的相干断层扫描比其他参数，准确的地相估计更为关键。

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