ERS-1 interferometric DEMs: examples and comparison with SPOT and USGS products

Frederic P. Perlant

doi:10.1117/12.197355

21 December 1994 ERS-1 interferometric DEMs: examples and comparison with SPOT and USGS products

Frederic P. Perlant

Proceedings Volume 2313, Microwave Instrumentation and Satellite Photogrammetry for Remote Sensing of the Earth; (1994) https://doi.org/10.1117/12.197355
Event: Satellite Remote Sensing, 1994, Rome, Italy

Abstract

In order to assess the actual industrial potential and limitations of SAR interferometry to generate DEM, we have processed several interferometric data and generated several DEM over different regions. In this paper we present several ERS-1 interferograms and interferometric DEM on mountainous, hilly and flat areas. The interferograms have been generated by CNES and we performed the unwrapping and geometric processing in order to get the final cartographic product. This processing chain is described. According to the different geometric and radiometric parameters such as the baseline and the nature of the coverage over each of these regions, we discuss the achieved or achievable final DEM accuracy, the incoherences, the artefacts level as well as the different steps along the processing chain. We describe the actual results compared to SPOT and/or USGS DEMs. The need for the three components of the interferometric products generated by CNES (Amplitude image, Coherence image and Phase difference image) will be demonstrated. Finally we will draw some conclusions in terms of operational accuracies and limitations.

Citation Download Citation

Frederic P. Perlant "ERS-1 interferometric DEMs: examples and comparison with SPOT and USGS products", Proc. SPIE 2313, Microwave Instrumentation and Satellite Photogrammetry for Remote Sensing of the Earth, (21 December 1994); https://doi.org/10.1117/12.197355

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KEYWORDS

Interferometry

Coherence (optics)

Image segmentation

Calibration

Synthetic aperture radar

Image processing

Satellites

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