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GPS-derived tropospheric delay corrections to differential InSAR results
Citation
Janssen, V, GPS-derived tropospheric delay corrections to differential InSAR results, Proceedings of ION GPS/GNSS 2003, 9-12 September 2003, Portland, Oregon, pp. 2692-2704. (2003) [Refereed Conference Paper]
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Copyright Statement
Copyright 2003 The Author
Official URL: http://www.ion.org/publications/toc/03gpstoc.html
Abstract
Differential Interferometric Synthetic Aperture Radar
(DInSAR) techniques have been recognized as an ideal
tool for many ground deformation monitoring
applications. However, the spatially and temporally
variable delay of the radar signal propagating through the
atmosphere is a major limitation to accuracy. The
dominant factor to be considered is the tropospheric
heterogeneity, which can lead to misinterpretation of
differential InSAR results. In this paper a between-site and
between-epoch double-differencing algorithm for the
generation of tropospheric corrections to DInSAR results
based on GPS observations is proposed. In order to correct
the radar results on a pixel-by-pixel basis, the GPSderived
corrections have to be interpolated. Using
experimental data it has been found that the inverse
distance weighted and kriging interpolation methods are
more suitable than the spline interpolation method.
Differential corrections as large as several centimeters
may have to be applied in order to ensure sub-centimeter
accuracy for the DInSAR result. The algorithm and
procedures described in this paper could easily be
implemented in a CGPS data network center. The gridded
between-site, single-differenced tropospheric delay values
can be derived as a routine product to assist radar
interferometry.
Item Details
Item Type: | Refereed Conference Paper |
---|---|
Research Division: | Earth Sciences |
Research Group: | Geophysics |
Research Field: | Geodesy |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Janssen, V (Dr Volker Janssen) |
ID Code: | 33355 |
Year Published: | 2003 |
Deposited By: | Geography and Environmental Studies |
Deposited On: | 2005-07-08 |
Last Modified: | 2014-06-05 |
Downloads: | 274 View Download Statistics |
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