InSAR coherence estimation for temporal analysis and phase unwrapping applications

Author

Abdelfattah, R. ; Nicolas, J.-M. ; Tupin, F. ; Badredine, B.

Author_Institution

Departement Traitement du Signal et des Images, Ecole Nationale Superieure des Telecommun., Paris, France

Volume

5

fYear

2001

fDate

2001

Firstpage

2292

Abstract

In SAR interferometry, coherence between data acquisitions is potential information on the accuracy of interferograms. In this paper, a new coherence estimation approach is investigated. Our study is based on a binary mixture modelisation of coherence images. A Bayesian criteria is so used to discriminate between the two statistical mixed laws. It is shown that empirical coherence is biased and depends on the number of pixels averaged. The results of this paper can be applied to the estimation of the interferogram noise in interferometric SAR

Keywords

Bayes methods; coherence; estimation theory; noise; radar imaging; radiowave interferometry; synthetic aperture radar; Bayesian criteria; InSAR coherence estimation; SAR interferometry; binary mixture modelisation; coherence images; interferogram noise; phase unwrapping applications; statistical mixed laws; temporal analysis; Coherence; Data acquisition; Dissolved gas analysis; Equations; Image analysis; Phase estimation; Probability density function; Signal analysis; Statistics; Synthetic aperture radar interferometry;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-7031-7

Type

conf

DOI

10.1109/IGARSS.2001.977979

Filename

977979