NDLI: An improved least-squares method for INSAR phase unwrapping

Content Provider	IEEE Xplore Digital Library
Author	Bao, M. Kwoh, L.K. Singh, K.
Copyright Year	1998
Description	Author affiliation: Centre for Remote Imaging, Sensing & Process., Nat. Univ. of Singapore, Singapore (Bao, M.)
Abstract	An improved least-squares phase unwrapping method is proposed by adding a constraint term which gives a smooth unwrapped phase in regions where the measured phase is corrupt. Moreover, the wavelet noise-removal technique is used for both real and imaginary parts of INSAR data. The phase partial derivatives obtained from filtered INSAR data are applied to calculate the unwrapped phase to relieve the slope underestimation problem. The derived equations for least-squares unwrapped phase are solved using Newton iteration under Gauss-Seidel relaxation schemes. A multigrid algorithm is used to speed up the convergence of the iteration. Results on simulated and real ERS-1/2 data demonstrate the efficiency and precision of this improved least-squares method.
Starting Page	62
Ending Page	64
File Size	367643
Page Count	3
File Format	PDF
ISBN	0780344030
DOI	10.1109/IGARSS.1998.702799
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-07-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synthetic aperture radar interferometry Phase measurement Filtering Cost function Equations Phase noise Gaussian processes Convergence Synthetic aperture radar Layout
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
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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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