TanDEM-X: DEM acquisition in the third year era. (1st January 2013)

• Record Type: Journal Article
• Authors: Tridon, Daniela Borla; Bachmann, Markus; Schulze, Daniel; Ortega-Míguez, Carlos; Polimeni, Maria Donata; Martone, Michele; Böer, Johannes; Zink, Manfred
• Is Part Of: International journal of space science and engineering. Volume 1:Number 4(2013)
• Page Start: 367
• Page End: 381
• Publication Date: 2013-01-01
• Subjects: digital elevation model -- DEM -- height of ambiguity -- HoA -- baseline -- DEM acquisition timeline; Space sciences -- Periodicals; Astronautics -- Periodicals; 629.405
• Languages: English
• ISSNs: 2048-8459

Abstract

TerraSAR-X add-on for digital elevation measurement (TanDEM-X) is a space-borne X-band SAR mission designed to derive a digital elevation model (DEM) of the Earth's land surface with an unprecedented relative vertical accuracy of 2 m at a 12 m posting. To achieve this goal, the two satellites fly in close controlled formation with the opportunity to adjust flexible along- and across-track baselines. A combination of multiple acquisitions with different baseline lengths is required to allow stable phase unwrapping and to achieve the high height accuracy. This paper provides an overview of the TanDEM-X acquisition plan for the third year over Antarctica, mountainous areas and deserts. Critical aspects of the areas to be acquired are presented and the acquisition strategy is illustrated. Moreover, the formation flight and the baselines are compared to the ones of the previous years in terms of their impact on the height of ambiguity and on the performance with respect to the interferometric quality.