CCM.G-K2.2017 and EURAMET.M.G-K3
MEASURAND Free-fall acceleration
NOMINAL VALUE 9.81 m/s2
Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µGal(1).
The degrees of equivalence have been determined via a weighted least-square adjustment of the measurements results obtainded with each NMI/DI gravimeter.
(1) The gal (symbol: Gal) is a non SI unit of acceleration employed in geodesy and geophysics to express acceleration due to gravity. 1 µGal = 1 x 10-8 m/s2.
AG - Acceleration Gravimeter
The instrument used is indicated within brackets, next to the institute acronym.
CCM.G-K2.2017 and EURAMET.M.G-K3
MEASURAND Free-fall acceleration
NOMINAL VALUE 9.81 m/s2
Degrees of equivalence represented by Di and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in µGal(1).
The degrees of equivalence have been determined via a weighted least-square adjustment of the measurements results obtainded with each NMI/DI gravimeter.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
µGal |
µGal |
µGal |
||
| BEV [FG5-242] | -0.1 | 6.9 | ||
| NIM [NIM-3A] | 0.4 | 6.3 | ||
| VÚGTK/RIGTC [FG5-215H] | -1.0 | 4.5 | ||
| FGI [FG5X-221] | 0.9 | 4.7 | ||
| LNE-SYRTE [FG5-228] | 0.3 | 5.5 | ||
| NMIJ AIST [FG5-213] | 0.0 | 6.5 | ||
| LGUL [FG5X-216] | 0.9 | 4.9 | ||
| KRISS [FG5X-104] | -0.6 | 4.3 | ||
| SASO-NMCC [FG5X-253] | -0.5 | 4.9 | ||
| METAS [FG5X-209] | 3.9 | 7.9 | ||
| NIMT [FG5X-248] | -0.7 | 4.7 | ||
| UME [FG5X-254] | -2.7 | 4.9 | ||
| NIST [FG5-204] | 1.3 | 3.9 | ||
| VÚGTK/RIGTC [FG5-215H] | -1.2 | 5.0 | ||
| BEV [FG5-242] | -1.1 | 5.5 | ||
| FGI [FG5X-221] | 1.1 | 5.3 | ||
| UME [FG5X-254] | -2.0 | 5.2 | ||
| INRIM [IMGC-02] | -1.1 | 10.9 |
(1) The gal (symbol: Gal) is a non SI unit of acceleration employed in geodesy and geophysics to express acceleration due to gravity. 1 µGal = 1 x 10-8 m/s2.
The instrument used is indicated within brackets, next to the institute acronym.
| Metrology area, Sub-field | Mass and related quantities, Gravity |
| Description | Free-fall acceleration |
| Time of measurements | 2018 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Free-fall acceleration at 9.81 m/s2 |
| Parameters | Free-fall accelerations corrected for gravimetric Earth tides, atmospheric and polar motion effects at 4 sites in Wettzell station (Germany) |
| Transfer device | Absolute gravimeters |
| Comparison type | Key Comparison |
| Consultative Committee | CCM (Consultative Committee for Mass and Related Quantities) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EURAMET Projet N° 1432 |
| Comments | The comparison is intended to be organised as EURAMET.M.G-K3 key comparison and pilot study and linked to the CCM.G-K2.2017 by means of joint participants. The results of comparison will be also used for demonstrating different adjustment approaches and for improvement of the Technical Protocol of comparisons. |
| Pilot institute |
VUGTK/RIGTC
Research Institute of Geodesy, Topography and Cartography Czechia |
| Contact person | Vojtech Pálinkáš +420 323649235 |
| Pilot laboratory | |
|---|---|
| VUGTK/RIGTC |
Research Institute of Geodesy, Topography and Cartography, Czechia, EURAMET |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| FGI |
Finnish Geospatial Research Institute, Finland, EURAMET |
| INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
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CCM.G-K2.2017 and EURAMET.M.G-K3
MEASURAND Free-fall acceleration
NOMINAL VALUE 9.81 m/s2
The gal (symbol: Gal) is a non SI unit of acceleration employed in geodesy and geophysics to express acceleration due to gravity. 1 µGal = 1 x 10-8 m/s2.
Linking EURAMET.M.G-K3 to CCM.G-K2.2017
The results issued from EURAMET.M.G-K3 were linked to CCM.G-K2.2017 via VUGTK/RIGTC (Czechia), BEV (Austria), FGI (Finland) and UME (Turkey) who participated in both comparisons, see EURAMET.M.G-K3 Final Report.
CCM.G-K2.2017 and EURAMET.M.G-K3
MEASURAND Free-fall acceleration
NOMINAL VALUE 9.81 m/s2
CCM.G-K2.2017
The gal (symbol: Gal) is a non SI unit of acceleration employed in geodesy and geophysics to express acceleration due to gravity. 1 µGal = 1 x 10-8 m/s2.
EURAMET.M.G-K3
The gal (symbol: Gal) is a non SI unit of acceleration employed in geodesy and geophysics to express acceleration due to gravity. 1 µGal = 1 x 10-8 m/s2
