Results of the sixth international comparison of absolute gravimeters, ICAG-2001

L. Vitushkin (1) , M. Becker (2) , Z. Jiang (1) , O. Francis (3) , T. M. Van Dam (3) , J. Faller (4) , J.-M. Chartier (1) , M. Amalvict (5) , S. Bonvalot (6) , Nicole Debeglia (7) , S. Desogus (8) , M. Diament (9) , François Dupont (7) , R. Falk (10) , G. Gabalda (6) , C. G. L. Gagnon (11) , Thierry Gattacceca (12) , A. Germak (8) , J. Hinderer (5) , C. Origlia (8) , O. Jamet (13) , J. Mäkinen (14) , G. Jeffries (15) , R. Käker (16) , A. Kopaev (17) , J. Liard (11) , A. Lindau (16) , Laurent Longuevergne (18) , B. Luck (5) , E. N. Maderal (19) , B. Meurers (20) , S. Mizushima (21) , J. Mrlina (22) , D. Newell (23) , E. R. Pujol (19) , A. Reinhold (10) , Ph Richard (24) , I. A. Robinson (25) , D. Ruess (26) , S. Thies (24) , M. Van Camp (27) , M. Van Ruymbeke (27) , M. F. de Villalta Compagni (19) , S. Williams (15)

1 BIPM - Bureau International des Poids et Mesures
2 IfG - Institut für Geodäsie [Neubiberg]
3 European Center for Geodynamics and Seismology
4 JILA - Joint Institute for Laboratory Astrophysics
5 IPGS-DGDA - Dynamique globale et déformation active (IPGS)
6 GET - Géosciences Environnement Toulouse
7 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
8 Istituto di Metrologia
9 IPGP - Institut de Physique du Globe de Paris
10 Bundesamt für Kartographie und Geodäsie
11 NRCan - Natural Resources Canada
12 IGN - Institut géographique national [IGN]
13 ENSG - Ecole nationale des sciences géographiques
14 FGI - Finnish Geodetic Institute
15 Proudman Oceanographic Laboratory
16 Institut für Erdmessung
17 Sternberg Astronomical Institute [Moscow]
18 SISYPHE - Structure et fonctionnement des systèmes hydriques continentaux
19 Instituto Geográfico Nacional
20 IMGW - Institut für Meteorologie und Geophysik [Wien]
21 National Metrology Institute of Japan
22 ASCR - Institute of Geophysics
23 NIST - National Institute of Standards and Technology [Gaithersburg]
24 Swiss Federal Office of Metrology and Accreditation
25 NPL - National Physical Laboratory [Teddington]
26 BEV - Federal Office of Metrology and Surveying [Vienna]
27 ROB - Royal Observatory of Belgium = Observatoire Royal de Belgique

The Sixth International Comparison of Absolute Gravimeters was held from 5 June to 28 August 2001 at the Bureau International des Poids et Mesures (BIPM), Sèvres. Seventeen absolute gravimeters were used to make measurements at five sites of the BIPM gravity network. The vertical gravity gradients at the sites and the ties between them were also measured using seventeen relative gravimeters. For the first time the ties were also measured using absolute gravimeters. Various methods of processing the absolute and relative data were tested to calculate the results. The final results of ICAG-2001 are presented. The acceleration due to gravity at a height of 0.90 m is given as (980 925 701.2 ± 5.5) µGal and (980 928 018.8 ± 5.5) µGal for sites A and B, respectively, calculated using a combined adjustment of the absolute and relative data.

Domaines: Géophysique [physics.geo-ph]; Géophysique [physics.geo-ph]; Interfaces continentales, environnement; Milieux et Changements globaux

L. Vitushkin, M. Becker, Z. Jiang, O. Francis, T. M. Van Dam, et al.. Results of the sixth international comparison of absolute gravimeters, ICAG-2001. Metrologia, 2002, 39, pp.407-424. ⟨10.1088/0026-1394/39/5/2⟩. ⟨hal-00710447⟩