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Quantification and compensation of temporal decorrelation effects in polarimetric SAR interferometry

Lee, Seung-Kuk and Kugler, Florian and Papathanassiou, Konstantinos and Hajnsek, Irena (2012) Quantification and compensation of temporal decorrelation effects in polarimetric SAR interferometry. In: Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS), pp. 1-4. IEEE. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2012-07-22 - 2012-07-27, Munich, Germany.

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Abstract

Several studies showed that Pol-InSAR data especially at lower frequencies such as L- and P-band, are sensitive to the vertical distribution of scatterer along forest height. A model-based inversion of forest height and structural parameters was introduced and demonstrated. However, in repeat-pass airborne/spaceborne SAR system, temporal decorrelation is one of the most critical parameter for a successful Pol-InSAR forest parameter inversion. Temporal decorrelation is caused by the dynamic changes of the scatterers and/or the variation of the dielectric properties of the scatterers within the scene occurring in the time between the two SAR acquisitions. Due to its random character it is difficult to estimate and compensate temporal decorrelation contributions from the complex interferometric coherence. Temporal decorrelation lowers the estimated coherence and therefore also the estimated volume decorrelation which is directly related to the vertical distribution of scatterers. A biased (lowered) volume coherence leads to a biased forest parameter estimation in Pol-InSAR inversion. In this study, we assess the quantitative analysis of temporal decorrelation as a function of time using experimental data acquired by DLR’s E-SAR system. Then we evaluate the implementation of multi-baseline inversion technique for compensating temporal decorrelation. The behavior and compensation of temporal decorrelation will be demonstrated by means of three campaign data sets: BioSAR 2007 and TempoSAR 2008/2009.

Document Type:Conference or Workshop Item (Speech)
Additional Information:(c) 2012 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Title:Quantification and compensation of temporal decorrelation effects in polarimetric SAR interferometry
Authors:
AuthorsInstitution or Email of Authors
Lee, Seung-KukUNSPECIFIED
Kugler, FlorianUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIED
Hajnsek, IrenaUNSPECIFIED
Date:25 July 2012
Journal or Publication Title:Proceedings of IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Page Range:pp. 1-4
Publisher:IEEE
Status:Published
Keywords:Pol-InSAR, temporal decorrelation, forest parameter
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:2012-07-22 - 2012-07-27
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Prosmart, Smart-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Seung-Kuk Lee
Deposited On:06 Jun 2012 16:51
Last Modified:08 May 2014 23:23

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