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Article
Open AccessSpecial issue “DynamicEarth: Earth’s interior, surface, ocean, atmosphere, and near space interactions”
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Article
High tilt susceptibility of the Scintrex CG-5 relative gravimeters
We report on the susceptibility of the Scintrex CG-5 relative gravimeters to tilting, that is the tendency of the instrument of providing incorrect readings after being tilted (even by small angles) for a mode...
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Article
Comparisons of atmospheric mass variations derived from ECMWF reanalysis and operational fields, over 2003–2011
There are two spurious jumps in the atmospheric part of the Gravity Recovery and Climate Experiment-Atmosphere and Ocean De-aliasing level 1B (GRACE-AOD1B) products, which occurred in January-February of the y...
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Article
Separation of global time-variable gravity signals into maximally independent components
The Gravity Recovery and Climate Experiment (GRACE) products provide valuable information about total water storage variations over the whole globe. Since GRACE detects mass variations integrated over vertical...
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Chapter and Conference Paper
Estimating Sub-Monthly Global Mass Transport Signals Using GRACE, GPS and OBP Data Sets
In an effort to learn more about the sub-monthly variations in the global mass transport processes of the Earth, a study has been performed in which the feasibility of using weekly GRACE gravity solutions, in ...
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Article
Decorrelated GRACE time-variable gravity solutions by GFZ, and their validation using a hydrological model
We have analyzed recent gravity recovery and climate experiment (GRACE) RL04 monthly gravity solutions, using a new decorrelating post-processing approach. We find very good agreement with mass anomalies deriv...
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Chapter and Conference Paper
Influence of Hydrology-Related Temporal Aliasing on the Quality of Monthly Models Derived from GRACE Satellite Gravimetric Data
Temporal variations of the Earth’s gravity field are traditionally represented with a set of spherical harmonic coefficients derived once per month. In practice, however, the gravity field changes continuously...
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Chapter
Assessment of the Results of VLBI Intra-Technique Combination Using Regularization Methods
Various important aspects should be taken into account in the combination of different space geodetic techniques. Consistency of models and standards, quality checks of solutions from individual Analysis Cente...
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Article
Hydrological Signals Observed by the GRACE Satellites
The main objective of the US-German twin-satellite mission GRACE (Gravity Recovery and Climate Experiment), launched in March 2002, is a precise survey of the Earth’s time-variable gravity field at unprecedent...
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Chapter and Conference Paper
Monte Carlo Integration for Quasi–linear Models
In this contribution we consider the inversion of quasi-linear models by means of Monte-Carlo methods. Quasi-linear models are a special class of non-linear models, which can be formally written in matrix-vect...
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Article
Comments on Xu et al. (2006) Variance component estimation in linear inverse ill-posed models, J Geod 80(1):69–81
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Chapter
Continental hydrology retrieval from GPS time series and GRACE gravity solutions
Monitoring of continental hydrology by measuring gravity variations is one of the primary aims of the Gravity Recovery and Climate Experiment (GRACE) mission. We proposed to combine the GRACE measurements with...
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Chapter
Towards an optimal combination of satellite data and prior information
With the CHAMP and GRACE satellite gravity missions and the upcoming GOCE mission, millions of gravity-related observations are being released to the geodetic community. In order to provide an optimal gravity ...
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Chapter and Conference Paper
Mass redistribution from global GPS timeseries and GRACE gravity fields: inversion issues
Monitoring hydrological redistributions through their integrated gravitational effect is one of the primary aims of the GRACE mission. Yet it has been proposed that at larger scales this may be achieved indepe...
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Chapter and Conference Paper
Multiresolution representation of a regional geoid from satellite and terrestrial gravity data
In this paper we present results from modeling the Earth’s gravitational field over the northern part of South-America using spherical wavelets. We have applied our analysis to potential data that we derived f...
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Chapter and Conference Paper
Stochastic model validation of satellite gravity data: A test with CHAMP pseudo-observations
The energy balance approach is used for a statistical assessment of CHAMP orbits, data and gravity models. It is known that the quality of GPS-derived orbits varies and that CHAMP accelerometer errors are diff...
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Chapter and Conference Paper
Estimating Covariance Parameters in Gravity Downward Continuation
We discuss same concepts related to the estimation of covariance parameters in the numerical treatment of gravity downward continuation. We aim explicitly at the determination of weighting factors, regularizat...
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Chapter and Conference Paper
Numerical techniques for large least-squares problems with applications to GOCE
The development of space-borne measurement sensors and powerful computer hardware, in combination with improvements in mathematical and physical modelling, allow us to determine the Earth’s gravity field with ...
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Article
Gibbs sampler for computing and propagating large covariance matrices
The use of sampling-based Monte Carlo methods for the computation and propagation of large covariance matrices in geodetic applications is investigated. In particular, the so-called Gibbs sampler, and its use ...
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Article
Computation of spherical harmonic coefficients from gravity gradiometry data to be acquired by the GOCE satellite: regularization issues
The issue of optimal regularization is investigated in the context of the processing of satellite gravity gradiometry (SGG) data that will be acquired by the GOCE (Gravity Field and Steady-State Ocean Circulat...
