Multibaseline phase unwrapping for InSAR topography estimation

Ferretti, A. and Prati, C. and Rocca, F. (2001) Multibaseline phase unwrapping for InSAR topography estimation. Il nuovo cimento C, 24 C (1). pp. 159-176. ISSN 1826-9885

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Multibaseline Synthetic Aperture Radar (SAR) Interferometry (INSAR) can be successfully exploited for automatic phase unwrapping and high quality Digital Elevation Model (DEM) reconstruction. The information coming from several interferograms with different baselines increases the elevation ambiguity interval and allows automatic phase unwrapping. The height of each pixel in the image is considered as a random variable: a Maximum-Likelihood (ML) estimation of the height is carried out by exploiting the probability density function of the interferometric phase, that depends on the local coherence value. After phase unwrapping is possible to combine all the information available, getting a combined DEM that is more reliable than each single DEM. Results obtained using ERS-1/2 SAR data gathered over Vesuvius and Etna are presented. In both cases an accuracy better than 8 meters was obtained.

Item Type: Article
Additional Information: Paper presented at the Workshop on Synthetic Aperture Radar (SAR), Florence, 25-26 February, 1998.
Uncontrolled Keywords: Topography: geometric observations ; Cartography ; Telemetry: remote control, remote sensing; radar
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra
Depositing User: Marina Spanti
Date Deposited: 10 Mar 2020 18:09
Last Modified: 10 Mar 2020 18:09

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