The Elusive Stationary Geoid

Author: Vermeer, M.

Source: Space Science Reviews, Volume 108, Number 1, 2003 , pp. 283-292(10)

Publisher: Springer

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Abstract:



We discuss the various problems occurring when trying to fix a geoid or geopotential model using sea level observations sampled during a limited time span from a bounded geographical domain. Such problems are on the one hand aliasing and spectral leakage, and on the other, the non-conservation of matter over only part of the world ocean.

In the light of these issues we discuss whether it is sensible to include in a definition of the global geoid the radially symmetric part of either the mean sea level field itself, or its linear or nonlinear time dependence, arriving at a negative conclusion.

Keywords: Stationary geoid; aliasing; mean sea level; spectral leakage

Document Type: Research Article

Affiliations: Institute of Geodesy, Department of Surveying, Helsinki University of Technology

Publication date: January 1, 2003

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