During the last years orbital SAR data have been acquired for almost every place in the world. This fact can be used for generating large Digital Elevation Models (DEM) of remote areas using SAR Interferometry (InSAR). Nevertheless, the generation of large quality DEMs using this technique presents several problems, such as temporal decorrelation -even with a one-day temporal gap between acquisitions-, baseline errors or SAR parameters calibration. These factors can dramatically degrade the quality of the final DEM and, therefore, advanced InSAR techniques are needed to minimize or compensate for these errors. In this paper the Institut Cartografic de Catalunya (ICC) presents a robust method for generating very large, high quality DEMs using a set of SAR mterferograms. The method is based on a simultaneous multiple adjustment of critical parameters for the SAR images using three types of phase-registered points: control points, known-height and corresponding points. Results for the area of Tierra del Fuego (Argentina) are also presented.
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机译：在过去几年中，已经为世界上几乎每个地方获得了轨道特区数据。该事实可用于使用SAR干涉测量（INSAR）生成偏远地区的大型数字高度模型（DEM）。尽管如此，使用该技术的大质量DEM的产生呈现了几个问题，例如时间去相关性 - 通过采集，基线误差或SAR参数校准之间的一天时间间隙。这些因素可以显着降低最终DEM的质量，因此，需要先进的INSAR技术来最小化或补偿这些错误。在本文中，Institut Cartografic de Catalunya（ICC）呈现了一种使用一组SAR MTerfera图产生非常大，高质量的DEM的稳健方法。该方法基于使用三种相位注册点的SAR图像的同时多次调整SAR图像：控制点，已知高度和对应点。还提出了Tierra del Fuego（阿根廷）面积的结果。
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