Results 241 to 250 of about 557,111 (275)

Measuring ocean mass variability from satellite gravimetry

Journal of Geodynamics, 2011
Since its launch in 2002, the Gravity Recovery and Climate Experiment (GRACE) has been providing important new information about water mass movement among the oceans, continents, and cryosphere.
Don Chambers, Jens Schröter
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Future Satellite Gravimetry for Geodesy

Earth, Moon, and Planets, 2004
After GRACE and GOCE there will still be need and room for improvement of the knowledge (1) of the static gravity field at spatial scales between 40 km and 100 km, and (2) of the time varying gravity field at scales smaller than 500 km. This is shown based on the analysis of spectral signal power of various gravity field components and on the ...
Flury, J., Rummel, R.
openaire   +3 more sources

Satellite Formation for a Next Generation Gravimetry Mission

2009
The technique called “Low-Low Satellite-to-Satellite Tracking” makes use of two-satellite loose formations for detecting the Earth’s gravity field and its space/time variations: the effect of the geopotential shows up as a variation of the inter-satellite distance, which is measured by a suitable metrology. Accelerometers are utilized on each satellite
CESARE S, MOTTINI S, MUSSO F, PARISCH M, SECHI G, CANUTO, Enrico, AGUIRRE M, LEONE B, MASSOTTI, Luca, SILVESTRIN P.   +9 more
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Satellite gravimetry for climate model evaluation

2021
Global coupled Earth System Models (ESMs) are important for predicting future climate conditions. To assess the quality and reliability of ESMs it is crucial to evaluate them against independent observations. In this thesis, land water storage-related variables from ESMs taking part in the Coupled Model Intercomparison Project Phases 5 and 6 (CMIP5 and
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Efficiency of using Satellite Measurements for Marine Gravimetry

2019 26th Saint Petersburg International Conference on Integrated Navigation Systems (ICINS), 2019
Efficiency of using global navigation satellite system (GNSS) measurements for determining the gravity anomalies (GA) at sea by solving the filtering and smoothing problems based on satellite and gravimeter data is studied. The GA, ship heaving, errors of satellite and gravimeter measurements are presented as stochastic processes. The analysis is based
D.A. Koshaev, A.V. Motorin, O.A. Stepanov   +2 more
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Why quantum satellite gravimetry?

Open Access Government
Why quantum satellite gravimetry? B.C. (Bart) Root, an Assistant Professor at Delft University of Technology, investigates the significance of quantum satellite gravimetry in this intriguing analysis. Quantum technologies in space are the next engineering frontier.
openaire   +1 more source

Simulation of a satellite gravimetry mission at Mars

Improving the data on the gravitational field of Mars can yield enhanced knowledge about Martian planetary dynamics and subsurface water reservoirs. In this study, we augment the VENQS software tool to perform simulations for a future dedicated satellite gravimetry mission at Mars following the archetype of GRACE-FO and as a result to study the ...
Bredlau, Marvin, Bremer, Stefanie, Schilling, Manuel, Wassermann, Noa Katharina   +3 more
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Lower satellite-gravimetry estimates of Antarctic sea-level contribution

Nature, 2012
Recent estimates of Antarctica's present-day rate of ice-mass contribution to changes in sea level range from 31 gigatonnes a year (Gt yr(-1); ref. 1) to 246 Gt yr(-1) (ref. 2), a range that cannot be reconciled within formal errors. Time-varying rates of mass loss contribute to this, but substantial technique-specific systematic errors also exist.
King, Matt A, Bingham, Rory J, Moore, Phil, Whitehouse, Pippa L, Bentley, Michael, Milne, Glenn A   +5 more
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Characterization of runoff‐storage relationships by satellite gravimetry and remote sensing

Water Resources Research, 2014
AbstractGRACE observations of the time‐dependent gravity field provide a direct measurement of the monthly state of mass and thus monthly total water storage in a catchment. This for the first time allows for a direct comparison of monthly runoff and water storage. Investigations of global scale Runoff‐Storage (R‐S) relationships for different climatic
Riegger, J., Tourian, M.
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The Future of the Satellite Gravimetry After the GOCE Mission

2011
Launched on March 17th 2009 from the Plesetsk Cosmodrome (Northern Russia), GOCE maps the Earth’s gravity field with unprecedented accuracy and resolution and will be of benefit for many branches of Earth science. This paper gives an overview of the European Space Agency’s (ESA) recent technical developments and activities going beyond the GOCE mission
P. Silvestrin, M. Aguirre, L. Massotti, B. Leone, S. Cesare, M. Kern, R. Haagmans   +6 more
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