Details
| Original language | English |
|---|---|
| Pages (from-to) | 257-268 |
| Number of pages | 12 |
| Journal | METROLOGIA |
| Volume | 50 |
| Issue number | 3 |
| Publication status | Published - 16 May 2013 |
Abstract
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 of 3.1 μGal. Finally, the results of this comparison are linked to previous ones. We conclude with some important recommendations for future comparisons.
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In: METROLOGIA, Vol. 50, No. 3, 16.05.2013, p. 257-268.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The European comparison of absolute gravimeters 2011 (ECAG-2011) in walferdange, Luxembourg
T2 - Results and recommendations
AU - Francis, Olivier
AU - Baumann, Henri
AU - Volarik, Tomas
AU - Rothleitner, Christian
AU - Klein, Gilbert
AU - Seil, Marc
AU - Dando, Nicolas
AU - Tracey, Ray
AU - Ullrich, Christian
AU - Castelein, Stefaan
AU - Hua, Hu
AU - Kang, Wu
AU - Chongyang, Shen
AU - Songbo, Xuan
AU - Hongbo, Tan
AU - Zhengyuan, Li
AU - Pálinkás, Vojtech
AU - Kostelecký, Jakub
AU - Mäkinen, Jaakko
AU - Näränen, Jyri
AU - Merlet, Sébastien
AU - Farah, Tristan
AU - Guerlin, Christine
AU - Santos, Franck Pereira Dos
AU - Moigne, Nicolas Le
AU - Champollion, Cédric
AU - Deville, Sabrina
AU - Timmen, Ludger
AU - Falk, Reinhard
AU - Wilmes, Herbert
AU - Iacovone, Domenico
AU - Baccaro, Francesco
AU - Germak, Alessandro
AU - Biolcati, Emanuele
AU - Krynski, Jan
AU - Sekowski, Marcin
AU - Olszak, Tomasz
AU - Pachuta, Andrzej
AU - Agren, Jonas
AU - Engfeldt, Andreas
AU - Reudink, René
AU - Inacio, Pedro
AU - McLaughlin, Daniel
AU - Shannon, Geoff
AU - Eckl, Marc
AU - Wilkins, Tim
AU - Westrum, Derek Van
AU - Billson, Ryan
PY - 2013/5/16
Y1 - 2013/5/16
N2 - 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 of 3.1 μGal. Finally, the results of this comparison are linked to previous ones. We conclude with some important recommendations for future comparisons.
AB - 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 of 3.1 μGal. Finally, the results of this comparison are linked to previous ones. We conclude with some important recommendations for future comparisons.
UR - http://www.scopus.com/inward/record.url?scp=84878835077&partnerID=8YFLogxK
U2 - 10.1088/0026-1394/50/3/257
DO - 10.1088/0026-1394/50/3/257
M3 - Article
AN - SCOPUS:84878835077
VL - 50
SP - 257
EP - 268
JO - METROLOGIA
JF - METROLOGIA
SN - 0026-1394
IS - 3
ER -