Results 181 to 190 of about 624 (220)
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Satellite Formation for a Next Generation Gravimetry Mission
2009The 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 +9 more
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Satellite gravimetry for climate model evaluation
2021Global 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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Future Satellite Gravimetry with a Network of Miniaturized Satellites
Abstract This feasibility study evaluates the potential of a CubeSat-based gravimetry mission for monitoring Earth’s gravity field, focusing on scientific benefits and technical implementation. Scientific requirements are derived from user needs, and suitable miniaturized instruments for accelerometry, GNSS, and inter-satellite ranging are ...N. Pfaffenzeller +3 more
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Satellite Gravimetry for Geophysical Purposes
Satellite gravimetry has transformed geophysical research by offering precise global measurements of Earth’s gravitational field. Combining ground, shipborne, and airborne data with satellite gravity models allows for the creation of high-resolution global gravity field models, essential in geophysics.Steffen, R. +3 more
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Efficiency of using Satellite Measurements for Marine Gravimetry
2019 26th Saint Petersburg International Conference on Integrated Navigation Systems (ICINS), 2019Efficiency 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 +2 more
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Why quantum satellite gravimetry?
Open Access GovernmentWhy 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.
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Lower satellite-gravimetry estimates of Antarctic sea-level contribution
Nature, 2012Recent 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 +5 more
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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 +3 more
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The Future of the Satellite Gravimetry After the GOCE Mission
2011Launched 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 +6 more
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Geoid of the Nordic and Baltic Region from Gravimetry and Satellite Altimetry
1997An updated high-resolution geoid model for the Scandinavian and Baltic region has been done by spherical FFT approaches, taking topography into account by a hybrid RTM/Helmert condensation approach. Significant new data sources have entered the geoid solution: a new spherical harmonic reference model, new gravity data over many regions, including the ...
Forsberg, Rene +2 more
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