Regional high-resolution spatiotemporal gravity modeling from GRACE data using spherical wavelets

Journal article (2006)
Department
Earth Observation and Space Systems (Aerospace Engineering) (TU Delft)
Copyright: © 2006 The Author(s); American Geophysical Union
DOI
help_outline
https://doi.org/doi:10.1029/2005GL025509
More Info
expand_more

Published Date

26-04-2006

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Source:

Geophysical Research Letters, 33, 2006

ISSN:

0094-8276

Source:

http://europa.agu.org/?view=article&uri=/journals/gl/gl0608/2005GL025509/2005GL025509.xml

Faculty

Aerospace Engineering

Department

Earth Observation and Space Systems

Abstract

We determine a regional spatiotemporal gravity field over northern South America including the Amazon region using GRACE inter-satellite range-rate measurements by application of a wavelet-based multiresolution technique. A major advantage of this method is that we are able to represent the Amazon hydrological signals in form of time series of detail signals with level-dependent temporal resolution: the coarser structures generally require only ten days, whereas the medium and finer details are computable from one month of data. To this end, we employ the basic property of multiresolution representations, which is to split a signal into detail signals, each related to a specific resolution level and computable from data covering a specific part of the spectrum. Our results, which for the first time fully exploit the spatial and temporal resolutions of GRACE data in modeling Amazon hydrological fluxes, are in good agreement with hydrological models and GPS-derived height variations.

Files

Kusche_2006.pdf
(pdf | 2.42 Mb)