TanDEM-X Ground Segment – DEM Products Specification Document

The purpose of this document is to describe the TanDEM-X DEM products, their specifications and formats.The chapter 4 introduces the main DEM product, and its variants. The target accuracies are presented (Section 4.1.) and the DEM generation process is shortly summarized in Section 4.2.. The DEM product specifications are given in Section 4.3. Therein, the accuracy and grid definitions (Section 4.3.1) all information layers are described (Section 4.3.2). Information about the structure of the DEM product is provided in Section 4.3.3. Section 4.4. gives a short summary about the characteristics of the Intermediate DEM Product and future FDEM and HDEM products. In the Appendices an introduction to the XML schema, product parameters and change log information are described. Please note that the current XSDs are appended to this document

The dual-baseline interferometric processing chain for the TanDEM-X mission

During the second operational year of the TanDEM-X mission, a second coverage of the whole land mass is acquired in order to produce a high accurate and high resolution DEM from a combination of both data sets. This paper presents the dual-baseline interferometric processing chain. Its main steps consist of coregistering the different interferograms (having different baselines), of unwrapping the phases and of comparing them to eliminate the possible unwrapping errors