Reduction of atmospheric water vapour effects on ENVISAT ASAR interferograms using MERIS near IR measurements

Li, Z. (2008) Reduction of atmospheric water vapour effects on ENVISAT ASAR interferograms using MERIS near IR measurements. In: The XXI Congress of the International Society for Photogrammetry and Remote Sensing, Beijing, China, 3-11Jul 2008,

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Abstract

Atmospheric water vapour effects represent a major limitation of repeat-pass Interferometric SAR (InSAR) techniques including InSAR time series approaches (e.g. permanent scatterers (PS) and small baseline subset (SBAS)). In this paper, it is demonstrated that atmospheric water vapour effects greater than 4 cm can be observed even in desert regions (e.g. Southern California) and the use of MERIS correction model can improve the accuracy of InSAR derived deformation signals from 9.9 mm to 4.1 mm. It is also shown that, using an advanced integration technique titled InSAR Time Series with Water Vapour correction model (InSAR TS + PWV) for reduction of water vapour effects with coincident MERIS near IR water vapour data, a time series of postseismic motion after the 2003 Bam (Iran) earthquake is achievable with about 50% reduction in RMS model misfit. It is believed that this study not only contributes directly to the ENVISAT mission, but also will benefit space agencies’ plans to design and launch InSAR missions because it aids in the identification of necessary characteristics of their future InSAR missions.

Item Type:Conference Proceedings
Keywords:InSAR; MERIS; InSAR TS + PWV; Time series analysis; Bam earthquake; postseismic motion
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Zhenhong
Authors: Li, Z.
Subjects:Q Science > QE Geology
G Geography. Anthropology. Recreation > GB Physical geography
T Technology > TA Engineering (General). Civil engineering (General)
College/School:College of Science and Engineering > School of Geographical and Earth Sciences

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