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Il Nuovo Cimento C, 1978
Thetwin probe method, proposed by Bertotti and Colombo (1972) to get rid of nongravitational forces in interplanetary space, can be applied to a near-Earth orbit to eliminate the atmospheric drag. Two equal pairs of probes, each pair consisting of two passive, small and dense spheres of equal surface and different masses, are flown on a circular orbit ...
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Thetwin probe method, proposed by Bertotti and Colombo (1972) to get rid of nongravitational forces in interplanetary space, can be applied to a near-Earth orbit to eliminate the atmospheric drag. Two equal pairs of probes, each pair consisting of two passive, small and dense spheres of equal surface and different masses, are flown on a circular orbit ...
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Space Geodesy: Observing Global Changes
2012Space geodesy and space geodetic applications are already so common in our everyday life that we even do not recognise them. Navigation satellites orbiting Earth allow us to measure our position everywhere within metres and applications using this precise positioning information are continuously increasing. Price of a simple navigator is already so low
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A Coherent Fibre Link for Space Geodesy
2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC), 2019We realized a coherent fiber link, 1739 km long, to connect a facility of the Italian Space Agency devoted to Space Geodesy. We describe here the motivations, the architecture of the link, the Time and Frequency station at the remote end and the first results.
Calonico, Davide +9 more
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General Relativity and Space Geodesy
2012Newton’s final version (published in 1726) of Philosophiae Naturalis Principia Mathematica was a great scientific achievement of the time and contained sufficient information to allow calculation of the dynamics of terrestrial and celestial bodies; it also expounded on the absolute nature of time and space.
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Optical two-way timing system for space geodesy applications
2016 European Frequency and Time Forum (EFTF), 2016Until now, time itself is not an observable in space geodesy. The major reason for this fact is the considerable difficulty to keep track of the phase of the clock oscillation between the point of origin and the point of the measurement. However, if geodesy will attempt to provide a reference frame fully based on general relativity, a proper treatment ...
Kodet, J. +5 more
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Space Geodesy and Earth Sciences
2002What will be the scientific issues of geodesy in the coming decade? Naturally, it is impossible to give an accurate answer to this question. However, an attempt can be made to look into the future based on some trends of the past. During the past three decades geodesy underwent fundamental changes, mainly due to the potential that became available ...
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Contributions of VLBI to Space Geodesy
2000The eminent importance of Very Long Baseline Interferometry (VLBI) in geodesy and geophysics is due to its connection with a quasi-inertial reference frame defined by compact extra-galactic radio sources. VLBI is unique in its ability to monitor without hypotheses all components of Earth orientation.
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Earth Physics and Global Glacial Isostasy: From Paleo-Geodesy to Space-Geodesy
2001The global phenomenon of glacial isostatic adjustment is one that involves internal Earth System interactions that are recorded in ways that are essentially “geodetic”. This phenomenon, in which changes in the shape of the viscoelastic earth are driven by large scale exchanges of mass between the cryosphere and the oceans, is observable both “paleo ...
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Refraction and propagation delays in space geodesy
International Journal of Remote Sensing, 1986Abstract Many measurements to satellites, whether of direct scientific interest or merely for tracking purposes, require a knowledge of the atmospheric propagation delay which affects the observation, The delay has to be precisely determined for such purposes as geodetic or navigation positioning using the TRANSIT system or GPS (Global Positioning ...
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The biofilm matrix: multitasking in a shared space
Nature Reviews Microbiology, 2022Hans-Curt Flemming +2 more
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