High-precision 3D geolocation of persistent scatterers with one single-Epoch GCP and LIDAR DSM data

Conference paper (2016)

Authors

M. Yang Wuhan University, Mathematical Geodesy and Positioning -

P. Dheenathayalan Mathematical Geodesy and Positioning -

L. Chang Railway Engineering -

J. Wang Optical and Laser Remote Sensing -

R.C. Lindenbergh Optical and Laser Remote Sensing -

Mingsheng Liao Wuhan University

R.F. Hanssen Mathematical Geodesy and Positioning -

Research Group

Optical and Laser Remote Sensing () (TU Delft)

Interferometry Data visualisation Image processing and data fusion In SAR

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Published Date

01-08-2016

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Remote Sensing

Research Group

Optical and Laser Remote Sensing

Abstract

In persistent scatterer (PS) interferometry, the relatively poor 3D geolocalization precision of the measurement points (the scatterers) is still a major concern. It makes it difficult to attribute the deformation measurements unambiguously to (elements of) physical objects. Ground control points (GCP's), such as corner reflectors or transponders, can be used to improve geolocalization, but only in the range-azimuth domain. Here, we present a method which uses only one GCP, visible in only one single radar acquisition, in combination with a digital surface model (DSM) data to improve the geolocation precision, and to achieve an object snap by projecting the scatterer position to the intersection with the DSM model, in the metric defined by the covariance matrix (i.e. error ellipsoid) of every scatterer.