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Home > Trappes Superconducting Gravimeter


LNE-SYRTE is responsible for primary metrology missions of gravimetry in France. At the Trappes site [1], the iGrav #005 superconducting gravimeters and the CAG transportable absolute atomic gravimeter [2] are operating. This laboratory has been designed to accommodate other gravimeters for metrological comparisons tests and calibrations [3, 4]. The team's primary activity is to provide the absolute value of g continuously to the neighbouring Kibble balance experiment, previously for Planck constant determination and now for the implementation of the new definition of the kilogram [5]. Research activities are aimed at both improving the accuracy of the CAG, of 20nm.s-2 [6] currently , to a level below 10nm.s-2, and its long term sensitivity, of 0.6nm.s-2 currently, to a level below 0.1nm.s-2.

You can access here different IGETS products, for the GWR iGrav #005 instrument also available at the IGETS database, i.e.:

The description of the formats/products can be found in the EOST products document.

GWR-iGrav #005 (since 2013)

GWR-iGrav #005 raw gravity and pressure
Figure 1: Level-1 data for the iGrav #005 instrument installed in Trappes since 2013.
GWR-iGrav #005 corrected gravity and pressure
Figure 2: Level-2 data for the iGrav #005 instrument installed in Trappes since 2013.
GWR-iGrav #005 gravity residuals
Figure 3: Level-3 data for the iGrav #005 instrument installed in Trappes since 2013.
download data download data download data

If you use these data, please cite: Merlet, S. and F. Pereira dos Santos (2020): Superconducting Gravimeter Data from LNE-SYRTE Trappes - Level 1. GFZ Data Services.


[1] S. Merlet, A. Kopaev, M. Diament, G. Genev├Ęs, A. Landragin and F. Pereira Dos Santos, Microgravity investigations for the LNE watt balance project, Metrologia 45 (2008), 265-274.

[2] A. Louchet-Chauvet, T. Farah, Q. Bodart, A. Clairon, A. Landragin, S. Merlet, F. Pereira Dos Santos, Influence of transverse motion within an atomic gravimeter, New J. of Phys. 13 (2011) 065025.

[3] S. Merlet, Q. Bodart, N. Malossi, A. Landragin, F. Pereira Dos Santos, O. Gitlein and L. Timmen, Comparison between two mobile absolute gravimeters : optical versus atomic interferometers, Metrologia 47 (2010), L9-L11.

[4] A. Louchet-Chauvet, S. Merlet, Q. Bodart, A. Landragin, F. Pereira Dos Santos, H. Baumann, G. D'Agostino and C. Origlia, Comparison of 3 absolute gravimeters based on different methods for the e-MASS project, IEEE Trans. on Instrum. Meas. 60 (2011), 2527-2532.

[5] M. Thomas, D. Ziane, P. Pinot, R. Karcher, A. Imanaliev, F. Pereira Dos Santos, S. Merlet, F. Piquemal and P. Espel, A determination of the Planck constant using the LNE Kibble balance in air, Metrologia 54 (2017) 468-480.

[6] R. Karcher, A. Imanaliev, S. Merlet and F. Pereira Dos Santos, Improving the accuracy of atom interferometers with ultracold atoms, New J. of Phys. 20 (2018) 113041.