Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/27568
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Trace coherence: A new operator for polarimetric and interferometric SAR IMAGES
Author(s): Marino, Armando
Keywords: Coherence
Covariance matrices
Synthetic aperture radar
Monte Carlo methods
Eigenvalues and eigenfunctions
Issue Date: 30-Apr-2017
Citation: Marino A (2017) Trace coherence: A new operator for polarimetric and interferometric SAR IMAGES. IEEE Transactions on Geoscience and Remote Sensing, 55 (4), pp. 2326-2339. https://www.scopus.com/inward/record.uri?eid=&doi=10.1109%2fTGRS.2016.2641742&partnerID=40&md5=0ab14718870480f4a3e734aef9877f1e; https://doi.org/10.1109/TGRS.2016.2641742
Abstract: Quadratic forms play an important role in the development of several polarimetric and interferometric synthetic aperture radar (Pol-InSAR) methodologies, which are very powerful tools for earth observation. This paper investigates integrals of Pol-InSAR operators based on quadratic forms, with special interest on the Pol-InSAR coherence. A new operator, namely Trace Coherence, is introduced, which provides an approximation for the center of mass of the coherence region (CoRe). The latter is the locus of points on the polar plot containing all the possible coherence values. Such center of mass can be calculated as the integral of Pol-InSAR coherences over the scattering mechanisms (SMs). The trace coherence provides synthetic information regarding the partial target as one single entity. Therefore, it provides a representation, which is not dependent on the selection of one specific polarization channel. It may find application in change detection (e.g., coherent change detection and differential DEM), classification (e.g., building structure parameters), and modeling (e.g., for the retrieval of forest height). In calculating the integral of the Pol-InSAR coherences, an approximate trace coherence expression is derived and shown to improve the calculation speed by several orders of magnitude. The trace coherence approximation is investigated using Monte Carlo simulations and validated ESA (DLR) L-band quad-polarimetric data acquired during the AGRISAR 2006 campaign. The result of the analysis using simulated and real data is that the average error in approximating the integral of the coherence region is 0.025 in magnitude and 3° in phase (in scenarios with sufficiently high coherence).
URL: https://www.scopus.com/inward/record.uri?eid=&doi=10.1109%2fTGRS.2016.2641742&partnerID=40&md5=0ab14718870480f4a3e734aef9877f1e
DOI Link: 10.1109/TGRS.2016.2641742
Rights: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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