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A continuous GPS coordinate time series analysis strategy for high-accuracy vertical land movements

Teferle, F. N.; Williams, S. D. P.; Kierulf, H. P.; Bingley, R. M.; Plag, H-P.. 2008 A continuous GPS coordinate time series analysis strategy for high-accuracy vertical land movements. Physics and Chemistry of the Earth, 33 (3-4). 205-216. 10.1016/j.pce.2006.11.002

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Abstract/Summary

CGPS coordinate time series analysis strategy was evaluated to determine highly accurate vertical station velocity estimates with realistic uncertainties. This strategy uses a combination of techniques to (1) obtain the most accurate parameter estimates of the station motion model, (2) infer the stochastic properties of the time series in order to compute more realistic error bounds for all parameter estimates, and (3) improve the understanding of apparent common systematic variations in the CGPS coordinate time series, which are believed to be of geophysical and/or technical origin. The strategy provided a pre-processing of the coordinate time series in which outliers and discontinuities were identified. Subsequent parameterization included a mean value, a constant rate, periodic terms with annual and semi-annual frequencies, and offset magnitudes for identified discontinuities. All parameters plus the magnitudes of different stochastic noise were determined using maximum likelihood estimation (MLE). Empirical orthogonal function (EOF) analysis was used to study both the temporal and spatial variability of the common modes determined by this technique. After outlining the CGPS coordinate time series analysis strategy this paper shows initial results for coordinate time series for a four year (2000–2003) period from a selection of CGPS stations in Europe that are part of the European Sea Level Service (ESEAS) CGPS network

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.pce.2006.11.002
Programmes: Oceans 2025 > Climate, ocean circulation and sea level
ISSN: 1474-7065
Additional Keywords: GLOBAL POSITIONING SYSTEM; COORDINATE TIME SERIES; MAXIMUM LIKELIHOOD ESTIMATION; EOF ANALYSIS; COMMON MODE; GPS; DISPLACEMENTS; NOISE
NORA Subject Terms: Marine Sciences
Date made live: 02 Feb 2009 15:13
URI: http://nora.nerc.ac.uk/id/eprint/5423

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