Interferometric Digital Elevation Model Reconstruction {--} Experiences from SRTM and Multi Channel Approaches for Future Missions
Eineder M, Krieger G (2005)
Publication Type: Conference contribution
Publication year: 2005
Publisher: IEEE
Edited Volumes: International Geoscience and Remote Sensing Symposium (IGARSS)
Series: Conference Proceedings
Book Volume: [4]
Pages Range: 2664-2667
Conference Proceedings Title: IGARSS 2005, IEEE International Geoscience and Remote Sensing Symposium
Event location: Seoul
ISBN: 0780390504
URI: https://elib.dlr.de/22261/
DOI: 10.1109/IGARSS.2005.1525614
Abstract
The Shuttle Radar Topography Mission flown in the year 2000 was the first approach to generate a global DEM from interferometric SAR. The C-band and X-band data acquired during 11 days have been processed with great success at NASA/JPL and at the German Aerospace Center DLR, respectively. Both data sets however show problems that should be taken care of in the design of future InSAR DEM missions: a) phase unwrapping turned out to be unreliable in rugged mountain areas with very steep slopes, b) radar shadow and layover rendered significant areas in rugged mountains unusable, c) the vertical accuracy was limited by the signal to noise ratio (SNR), by the baseline length and by the baseline knowledge. The SNR is expensive to improve and future missions like, e.g. the TanDEM-X mission currently studied at DLR, tend to use larger baselines therefore. This, however, will further complicate phase unwrapping. The key to improve phase unwrapping stability while simultaneously increasing height accuracy is a multi channel InSAR system. Multiple channels can be achieved by different frequencies, delta-k processing, multiple simultaneous baselines or multiple observations with different baselines. This paper summarizes the SRTM difficulties and sketches the strategies that could overcome them in future multi satellite missions. A baseline selection and acquisition strategy together with accompanying processing techniques are proposed in order to generate a global high precision DEM of the Earth in a reasonable time with available technologies. © 2005 IEEE.
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Germany (DE)How to cite
APA:
Eineder, M., & Krieger, G. (2005). Interferometric Digital Elevation Model Reconstruction {--} Experiences from SRTM and Multi Channel Approaches for Future Missions. In IEEE (Eds.), IGARSS 2005, IEEE International Geoscience and Remote Sensing Symposium (pp. 2664-2667). Seoul: IEEE.
MLA:
Eineder, Michael, and Gerhard Krieger. "Interferometric Digital Elevation Model Reconstruction {--} Experiences from SRTM and Multi Channel Approaches for Future Missions." Proceedings of the 2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005, Seoul Ed. IEEE, IEEE, 2005. 2664-2667.
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