References of "Francis, Olivier 50001803"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailReply to Comment on: ‘The quest for a consistent signal in ground and GRACE gravity time series’
Van Camp, Michel; de Viron, Olivier; Métivier, Laurent et al

in Geophysical Journal International (2014), 199(3), 1818-1822

Detailed reference viewed: 248 (4 UL)
Full Text
Peer Reviewed
See detailFuture and development of the European Combined Geodetic Network ECGN
Poutanen, Markku; Ihdes, Johannes; Bruyninx, Carine et al

in Rizos, C.; Willis, Pascal (Eds.) Earth on the Edge: Science for a Sustanaible Planet (2014)

Detailed reference viewed: 147 (1 UL)
Full Text
Peer Reviewed
See detailThe quest for a consistent signal in ground and GRACE gravity time series
Van Camp, Michel; de Viron, Olivier; Métivier, Laurent et al

in Geophysical Journal International (2014), 197

Detailed reference viewed: 161 (15 UL)
Full Text
Peer Reviewed
See detailAccurate Determination of the Earth Tidal Parameters at the BIPM to Support the Watt Balance Project
Francis, Olivier UL; Rothleitner, Christian UL; Jiang, Z.

in Rizos, C.; Willis, P. (Eds.) Earth on the Edge: Science for a Sustanaible Planet (2014)

Detailed reference viewed: 157 (14 UL)
Full Text
See detailTidal gravity measurements in Southeast Asia revisited
Francis, Olivier UL; van Dam, Tonie UL

in Sun, Heping (Ed.) Progress on Geodesy and Geodynamics (2014)

Detailed reference viewed: 194 (25 UL)
Full Text
See detailDétermination de l'accélération de la pesanteur pour la balance du watt du LNE
Merlet, Sébastien; Gillot, Pierre; Farah, Tristan et al

in Revue Française de Métrologie (2014), 36(2014-4), 11-27

The “watt balance” project aims at linking the kilogram definition to the Planck constant. The weighing of the mass involved requires a determination of the acceleration g with an uncertainty better than ... [more ▼]

The “watt balance” project aims at linking the kilogram definition to the Planck constant. The weighing of the mass involved requires a determination of the acceleration g with an uncertainty better than 10-8. This work aims at determining g with an atomic gravimeter and a dedicated gravimetric site. [less ▲]

Detailed reference viewed: 194 (2 UL)
Full Text
See detailAbsolute gravity measurements at the Conrad Observatory by the University of Luxembourg
Francis, Olivier UL

Article for general public (2014)

Detailed reference viewed: 152 (12 UL)
Full Text
Peer Reviewed
See detailMeasurement of the speed-of-light perturbation of free-fall absolute gravimeters
Rothleitner, Christian UL; Niebauer, Tim; Francis, Olivier UL

in Metrologia (2014), 51(3), 9

We report on a direct measurement of the relativistic Doppler shift with a commercial free-fall absolute gravimeter of the type FG5X. The observed Doppler shift, which is commonly called speed-of-light ... [more ▼]

We report on a direct measurement of the relativistic Doppler shift with a commercial free-fall absolute gravimeter of the type FG5X. The observed Doppler shift, which is commonly called speed-of-light perturbation, can be well described by the relativistic Doppler formula, where the constant object velocity is replaced by a time-dependent velocity with constant acceleration. The observed speed-of-light perturbation stands in contrast to other publications, which predict a higher frequency shift. It has been measured with a relative uncertainty of 1.1 × 10 −3 . [less ▲]

Detailed reference viewed: 88 (6 UL)
Full Text
Peer Reviewed
See detailConstraints on the upper crustal magma reservoir beneath Yellowstone Caldera inferred from lake-seiche induced strain observations
Luttrell, Karen; Mencin, David; Francis, Olivier UL et al

in Geophysical Research Letters (2013), 40(3), 501--506

Detailed reference viewed: 126 (14 UL)
Full Text
Peer Reviewed
See detailThe European Comparison of Absolute Gravimeters 2011 (ECAG-2011) in Walferdange, Luxembourg: results and recommendations
Francis, Olivier UL; Baumann, Henri; Volarik, Tomas et al

in Metrologia (2013), 50(3), 257

We present the results of the third European Comparison of Absolute Gravimeters held in Walferdange, Grand Duchy of Luxembourg, in November 2011. Twenty-two gravimeters from both metrological and non ... [more ▼]

We present the results of the third European Comparison of Absolute Gravimeters held in Walferdange, Grand Duchy of Luxembourg, in November 2011. Twenty-two gravimeters from both metrological and non-metrological institutes are compared. For the first time, corrections for the laser beam diffraction and the self-attraction of the gravimeters are implemented. The gravity observations are also corrected for geophysical gravity changes that occurred during the comparison using the observations of a superconducting gravimeter. We show that these corrections improve the degree of equivalence between the gravimeters. We present the results for two different combinations of data. In the first one, we use only the observations from the metrological institutes. In the second solution, we include all the data from both metrological and non-metrological institutes. Those solutions are then compared with the official result of the comparison published previously and based on the observations of the metrological institutes and the gravity differences at the different sites as measured by non-metrological institutes. Overall, the absolute gravity meters agree with one another with a standard deviation of3.1 µ Gal. Finally, the results of this comparison are linked to previous ones. We conclude with some important recommendations for future comparisons. [less ▲]

Detailed reference viewed: 210 (18 UL)
Full Text
Peer Reviewed
See detailOn the gravimetric contribution to watt balance experiments
Jiang, Z.; Pálinkáš, V.; Francis, Olivier UL et al

in Metrologia (2013), 50(5), 452

It has been recommended that the relative standard uncertainty of the numerical value of the Planck constant required for the redefinition of the kilogram should not exceed 2 × 10 −8 . To reach this goal ... [more ▼]

It has been recommended that the relative standard uncertainty of the numerical value of the Planck constant required for the redefinition of the kilogram should not exceed 2 × 10 −8 . To reach this goal using experiments based on a watt balance, the free-fall acceleration ( g ) traceable to the SI, at a given point and a given time, needs to be known with a sufficiently small uncertainty well below 2 × 10 −8 . Reducing the uncertainty in g allows the other uncertainties related to the watt balance to be increased. Instead of a simultaneous operation of an absolute gravimeter with a watt balance, we propose an alternative approach and demonstrate that a standard uncertainty below 5 µGal (relative uncertainty of 5 × 10 −9 ) is reachable under the conditions at BIPM. Further decreasing the uncertainty could significantly increase commitments in terms of personnel and equipment and would not significantly improve the uncertainty targeted for the BIPM watt balance experiment. A 5 µGal uncertainty might also satisfy the needs of other watt balance experiments underway or planned. In our approach we combine the following information: (1) the Key Comparison Reference Values obtained from the CCM.G-K1, a key comparison carried out in the frame of the International Comparison of Absolute Gravimeters in 2009 (ICAG2009); (2) the accurate gravity network established using the qualified absolute and relative gravimeters; (3) temporal gravity variations based on observed Earth-tide parameters and modelled effects of polar motion and atmospheric mass redistribution; (4) uncertainty estimates that account for non-modelled effects; (5) the option to carry out absolute gravity measurements once every one or two years with two or more gravimeters for monitoring the stability of the gravity field at the BIPM. [less ▲]

Detailed reference viewed: 129 (1 UL)
Full Text
Peer Reviewed
See detailUpdating the Precise Gravity Network at the BIPM
Jiang, Z.; Arias, E. F.; Tisserand, L. et al

in Geodesy for Planet Earth (2012)

Detailed reference viewed: 175 (12 UL)
Full Text
See detailECAG-2011 期间 FG5/232 绝对重力仪观测及结果分析
Songbai, Xuan; Chongyang, Shen; Hongbo, Tan et al

in 大地测量与地球动力学 (2012), 32(4),

Detailed reference viewed: 3461 (17 UL)
Full Text
Peer Reviewed
See detailResults of the first North American comparison of absolute gravimeters, NACAG-2010
Schmerge, D.; Francis, Olivier UL; Henton, J. et al

in Journal of Geodesy (2012), 86

Detailed reference viewed: 115 (2 UL)