The spaceborne mission TanDEM-X successfully acquired and processed a global Digital Elevation Model (DEM) from interferometric bistatic SAR data at X band. The product has been delivered in 2016 and is characterized by an unprecedented vertical accuracy. It is provided at 12 m, 30 m, and 90 m sampling and can be accessed by the scientific community via a standard announcement of opportunity process and the submission of a scientific proposal. The 90 m version is freely available for scientific purposes. The DEM is unedited, which means that it is the pure result of the interferometric SAR processing and subsequent mosaicking. Residual gaps, resulting, e.g., from unprocessable data, are still present and water surfaces appear noisy. This paper reports on the algorithms developed at DLR’s Microwaves and Radar Institute for a fully automatic editing of the global TanDEM-X DEM comprising gap filling and water editing. The result is a new global gap-free DEM product at 30 m sampling, which can be used for a large variety of scientific applications. It also serves as a reference for processing the upcoming TanDEM-X Change DEM layer.

中文翻译：

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全自动算法，用于编辑TanDEM-X全局DEM

太空飞行任务TanDEM-X从X波段的干涉双基地SAR数据成功获取并处理了全球数字高程模型（DEM）。该产品已于2016年交付，具有前所未有的垂直精度。它以12 m，30 m和90 m的采样率提供，科学界可以通过机会过程的标准公告和科学建议的提交来访问。90 m版本可免费用于科学目的。DEM未经编辑，这意味着它是干涉SAR处理和后续镶嵌的纯结果。仍然存在例如由于无法处理的数据而导致的残留间隙，并且水面显得嘈杂。本文报告了DLR微波与雷达研究所开发的用于对包括缝隙填充和注水编辑在内的全球TanDEM-X DEM进行全自动编辑的算法。结果是在30 m采样时获得了一种新的全球无间隙DEM产品，该产品可用于多种科学应用。它还可作为处理即将到来的TanDEM-X Change DEM层的参考。