串联双天线星载SAR干涉测量的概念研究与性能分析
Conceptual Study and Performance Analysis of Tandem Dual-Antenna Spaceborne SAR Interferometry
AI总结：
本文提出串联双天线星载SAR干涉测量（TDA-InSAR）新概念，通过最优多基线设计与渐近三维相位解缠，实现单次航过高精度三维地表测绘，仿真验证了其可行性与性能。
摘要：
多基线合成孔径雷达干涉测量（MB-InSAR）能够以高精度绘制三维地表模型，通过利用基线多样性克服了单基线InSAR中的不适定问题。单次航过MB采集具有高相干性和简单相位分量的优势，在三维重建方面比传统的重复航过MB采集更具实用性。利用渐近三维相位解缠（PU），可以在采集非常稀疏的情况下获得可靠的三维重建，但干涉图应遵循最优基线设计。然而，当前星载SAR系统不满足这一原则，给实际应用带来了更多困难。本文提出了一种新的串联双天线SAR干涉测量（TDA-InSAR）系统概念，用于使用渐近三维PU进行单次航过可靠的三维地表测绘。分析了其最优MB采集，以实现良好的相对高度精度和灵活的基线设计。选取两个指标，即预期相对高度精度和相位解缠成功率，来优化系统参数并评估各种基线配置的性能。此外，进行了基于仿真的演示，以评估典型场景下的性能并研究各种误差源的影响。结果表明，所提出的TDA-InSAR能够获得用于渐近三维PU的指定MB采集，为单次航过三维SAR成像提供了一种可行的解决方案。
英文摘要：
Multi-baseline synthetic aperture radar interferometry (MB-InSAR), capable of mapping 3D surface model with high precision, is able to overcome the ill-posed problem in the single-baseline InSAR by use of the baseline diversity. Single pass MB acquisition with the advantages of high coherence and simple phase components has a more practical capability in 3D reconstruction than conventional repeat-pass MB acquisition. Using an asymptotic 3D phase unwrapping (PU), it is possible to get a reliable 3D reconstruction using very sparse acquisitions but the interferograms should follow the optimal baseline design. However, current spaceborne SAR system doesn't satisfy this principle, inducing more difficulties in practical application. In this article, a new concept of Tandem Dual-Antenna SAR Interferometry (TDA-InSAR) system for single-pass reliable 3D surface mapping using the asymptotic 3D PU is proposed. Its optimal MB acquisition is analyzed to achieve both good relative height precision and flexible baseline design. Two indicators, i.e., expected relative height precision and successful phase unwrapping rate, are selected to optimize the system parameters and evaluate the performance of various baseline configurations. Additionally, simulation-based demonstrations are conducted to evaluate the performance in typical scenarios and investigate the impact of various error sources. The results indicate that the proposed TDA-InSAR is able to get the specified MB acquisition for the asymptotic 3D PU, which offers a feasible solution for single-pass 3D SAR imaging.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
