干涉合成孔径雷达基线估计要素分析

基线是干涉合成孔径雷达(InSAR)工作原理中的关键参数。它既使图像对产生了相干性，又是干损的根源之一。准确的理解它是掌握InSAR原理与相应的成像处理的基础。在DEM误差允许的条件下，一定存在着使DEM精度最好的最优基线。本文主要论述了基线、基线相干损失、极限基线和最优基线的概念及其相互关系，并给出了极限基线的表达式。建立了最优基线模型，最后通过仿真实验证明了该模型的有效性。

Analysis of the Elements of Baseline Estimation of Interferometric SAR

Baseline is a key parameter in the theory of the interferometric synthetic aperture radar (InSAR). The baseline makes image pairs correlative. However it is also one of the sources which makes them decorrelation. So it is important to understand the baseline exactly. And it is also the basis of mastering InSAR theory and relevant image processing. In the condition of accepted DEM error, there must be an optimal baseline which makes DEM precision best. This article mainly discusses several concepts concerning baseline, such as decorrelation, critical and optimal baselines etc. Besides the relationships among them are mentioned too. Furthermore the optimal baseline model is established. Finally, The validation of the model via test is demonstrated.