Ensuring globally the TanDEM-X height accuracy: Analysis of the reference data sets ICESat, SRTM and KGPS-tracks

The TanDEM-X mission will derive a global digital elevation model (DEM) with satellite SAR interferometry. Height references play an important role to ensure the required height accuracy of 10 m absolute and 2 m relative for 90% of the data. In this paper the main height reference data sets ICESat (...

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Bibliographic Details
Main Authors: Huber, M., Wessel, B., Kosmann, D., Felbier, A., Schwieger, V., Habermeyer, M., Wendleder, A., Roth, A.
Format: Conference Proceeding
Language:English
Subjects:
Calibration
Digital Elevation Model
Digital elevation models
Extraterrestrial measurements
Global Positioning System
ICESat
kinematic Global Positioning System
Kinematics
Land surface
Remote sensing
Satellites
Spatial databases
SRTM
TanDEM-X
Vegetation mapping
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Summary:The TanDEM-X mission will derive a global digital elevation model (DEM) with satellite SAR interferometry. Height references play an important role to ensure the required height accuracy of 10 m absolute and 2 m relative for 90% of the data. In this paper the main height reference data sets ICESat (for DEM calibration), SRTM (for phase unwrapping) and kinematic GPS-Tracks (KGPS - for DEM verification) are analyzed regarding to their accuracy. For the ICESat data a reliable quality measure is developed. For SRTM an improved version adjusted to reliable ICESat data is presented and a concept for collecting and evaluating decimeter-precise kinematic GPS tracks is proposed.
ISSN:2153-6996
2153-7003
DOI:10.1109/IGARSS.2009.5418204