A maximum likelihood a priori filter for interferometric phase

Author

Hubig, Michael

Author_Institution

German Aerosp. Res. Establ., Oberpfaffenhofen, Germany

Volume

1

fYear

1999

fDate

1999

Firstpage

482

Abstract

Image regions of low coherence represent a major problem in the evaluation of InSAR phases. One possibility to deal with this problem consists in filtering the wrapped phase. The interferometric wrapped phase of InSAR images can be interpreted as a random variable. Its well known pdf has the wrapped topographic phase as parameter. Therefore it is possible to estimate the topographic wrapped phase by using a maximum likelihood approach based on a locally affine model. The paper gives a description of the algorithm and presents tests on a synthetic as well as on a real scene

Keywords

geophysical signal processing; geophysical techniques; maximum likelihood estimation; radar imaging; remote sensing by radar; synthetic aperture radar; terrain mapping; InSAR; SAR; algorithm; geophysical measurement technique; image region; interferometric phase; interferometric wrapped phase; land surface; locally affine model; low coherence; maximum likelihood a priori filter; pdf; radar imaging; radar remote sensing; random variable; synthetic aperture radar; terrain mapping; topographic wrapped phase; wrapped phase; wrapped topographic phase; Costs; Filtering; Filters; Layout; Maximum likelihood estimation; Noise reduction; Phase estimation; Phase noise; Synthetic aperture radar interferometry; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International

Conference_Location

Hamburg

Print_ISBN

0-7803-5207-6

Type

conf

DOI

10.1109/IGARSS.1999.773540

Filename

773540