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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Impacts of Systematic Errors on Topographic Parameter Estimation in Multitemporal InSAR: A Quantitative Description
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Impacts of Systematic Errors on Topographic Parameter Estimation in Multitemporal InSAR: A Quantitative Description

机译:系统误差对多立体轴突的地形参数估计的影响:定量描述

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摘要

Estimation of surface deformation using synthetic aperture radar interferometry (InSAR) technique requires a precise removal of the topographic phase. Under multitemporal InSAR (MTInSAR) framework, topographic residual raised by differential operation with external Digital Elevation Model (DEM) is usually parameterized and jointly estimated together with deformation model, while the estimation can be distorted by systematic errors (e.g., model bias, baseline error). This letter aims to offer practical guidelines to users of MTInSAR framework concerning these errors and estimation precision. Starting from the generalized model, we derived the error propagation formula to quantitatively indicate how and to what extent the systematic errors degrade the topographic parameter estimation. The formulas validated by simulated tests are expected to be useful for optimal selection of MTInSAR modeling strategies and development of innovative algorithms (e.g., non-parametric estimator) for retrieval of DEM residuals from MTInSAR measurements.
机译:使用合成孔径雷达干涉法(INSAR)技术的表面变形估计需要精确地去除地形阶段。在MultiMporal Insar(MTINSAR)框架下,通过具有外部数字高度模型(DEM)的差分操作提出的地形残差通常与变形模型一起参数化和联合估计,而估计可以通过系统错误(例如,模型偏置,基线误差)扭曲)。这封信旨在为有关这些错误和估计精度的MTINSAR框架用户提供实用的指导方针。从广义模型开始,我们派生了错误传播公式,以定量地表明系统错误降低了地形参数估计的程度。预计通过模拟测试验证的公式可用于最佳选择MTINSAR建模策略和开发创新算法(例如,非参数估计器),用于从MTINSAR测量中检索DEM残差。

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