NDLI: A new InSAR coregistration strategy for geophysical applications

Content Provider	IEEE Xplore Digital Library
Author	Teng Wang Jonsson, S.
Copyright Year	2012
Description	Author affiliation: King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia (Teng Wang; Jonsson, S.)
Abstract	SAR image coregistration is a key procedure before starting InSAR time-series analysis. However, many geophysical datasets suffer from severe decorrelation problems due to a variety of reasons, making precise coregistration a difficult task. Here we present a new strategy that combines pixel-offset series on detected point-like match patches and geometrical mapping functions, in an attempt to improve SAR image coregistration and InSAR time-series analysis. First, all potentially coherent image pairs are coregistered. Then pixel-offset series on point-like targets, detected using coherence analysis, are estimated from amplitude maps and they are used to correct the geometrical mapping function. Finally, all the slave images are resampled depending on the pixel offsets calculated from the corrected geometrical mapping function. The proposed method was applied to two ENVISAT ASAR test datasets and a clear coregistration improvement was found, which should lead to better InSAR time-series analysis results.
Sponsorship	IEEE Geoscience Remote Sensing Soc.
Starting Page	3995
Ending Page	3998
File Size	1153092
Page Count	4
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6350534
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synthetic aperture radar Coherence Remote sensing Polynomials Indexes Interferometry Point-like targets Coregistration Time-series InSAR
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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