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for the orthorectified RapidEye data was within one pixel (5m 
spacing) compared to the TerraSAR-X data. 
3. CONCLUSION 
In the frame of the research project tests considering different 
acquisition scenarios for radargrammetric processing of 
TerraSAR-X StripMap data were performed. It was shown that 
the generation of Digital Surface Models based on TerraSAR-X 
data using radargrammetry techniques is possible even for very 
complex terrain conditions. The combination of DSMs derived 
from ascending and descending orbit helps to minimise 
significantly void areas from shadow and layover. The results 
also confirmed theoretical considerations with respect to the 
acquisition scenarios best suited for radargrammetric 
processing. All the results were included into the development 
process of the TerraSAR-X ELEVATION product and 
processor [1,5]. 
Furthermore, it was demonstrated that the resulting TerraSAR- 
X ELEVATION DSM is very well suited for orthorectification 
of both optical and SAR satellite data. 
ACKNOWLEDGEMENTS 
We would like to express our thanks to 
• the participants of the Juneau Icefield Research 
project (Univ. German Forces, TUniv. Munich, 
TUniv. Darmstadt, ETH Zurich) for providing the 
reference data. 
• DLR for the funding of the development project 
TERRAPID-3D 
• RapidEye AG for the very good cooperation in the 
frame of the TERRAPID-3D project. 
REFERENCES 
[1] Infoterra GmbH: TerraSAR-X Exploitation - TerraSAR-X 
Elevation Product Specification, TSXX-ITD-SPE-0014, 
2010. 
[2] DLR (German Aerospace Centre): TerraSAR-X Basic 
Product Specification Document, 2008. 
[3] Hirano, A. et al.: Mapping from ASTER stereo image 
data: DEM validation and accuracy assessment. ISPRS 
Journal of Photogrammetry & Remote Sensing. 57 
(2003), pp. 356-370 
[4] Maune, D. F.: Digital Elevation Model Technologies and 
Applications: The DEM User Manual. 2 nd Edition. 
Bethesda, Maryland: ASPRS, 2007 
[5] Infoterra GmbH: TerraSAR-X Elevation DSM Brochures, 
Immenstaad, Germany 
http://infoterra.de/fileadminWerzeichnisordner/Dokument 
e/2_AboutUs/0203_Brochures/e_TSX_ELEVATION_20 
1005_download.pdf (accessed June 2010)