Details
| Original language | English |
|---|---|
| Article number | 62 |
| Journal | Journal of geodesy |
| Volume | 95 |
| Issue number | 5 |
| Publication status | Published - 10 May 2021 |
Abstract
We present a 27-day-long common view measurement of an absolute cold atom gravimeter (CAG) and a relative iGrav superconducting gravimeter, which we use to calibrate the iGrav scale factor. This allowed us to push the CAG long-term stability down to the level of 0.5 nm s- 2. We investigate the impact of the duration of the measurement on the uncertainty in the determination of the correlation factor and show that it is limited to about 3‰ by the coloured noise of our cold atom gravimeter. A 3-day-long measurement session with an additional FG5X absolute gravimeter allows us to directly compare the calibration results obtained with two different absolute meters. Based on our analysis, we expect that with an improvement of its long-term stability, the CAG will allow to calibrate the iGrav scale factor to better than the per mille level (1σ level of confidence) after only 1 day of concurrent measurements for maximum tidal amplitudes.
Keywords
- Absolute atom gravimeter, Absolute free fall corner cube gravimeter, Relative superconducting gravimeter, Scale factor
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
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In: Journal of geodesy, Vol. 95, No. 5, 62, 10.05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Calibration of a superconducting gravimeter with an absolute atom gravimeter
AU - Merlet, S.
AU - Gillot, Pierre
AU - Cheng, Bing
AU - Karcher, Romain
AU - Imanaliev, Almazbek
AU - Timmen, Ludger
AU - Pereira dos Santos, Franck
N1 - Funding Information: This research is carried on within the kNOW and ITOC projects, which acknowledges the financial support of the EMRP. The EMRP was jointly funded by the European Metrology Research Programme (EMRP) participating countries within the European Association of National Metrology Institutes (EURAMET) and the European Union. B.C. thanks the Labex First-TF for financial support. This work has been supported by the Paris Île-de-France Région in the framework of DIM SIRTEQ.
PY - 2021/5/10
Y1 - 2021/5/10
N2 - We present a 27-day-long common view measurement of an absolute cold atom gravimeter (CAG) and a relative iGrav superconducting gravimeter, which we use to calibrate the iGrav scale factor. This allowed us to push the CAG long-term stability down to the level of 0.5 nm s- 2. We investigate the impact of the duration of the measurement on the uncertainty in the determination of the correlation factor and show that it is limited to about 3‰ by the coloured noise of our cold atom gravimeter. A 3-day-long measurement session with an additional FG5X absolute gravimeter allows us to directly compare the calibration results obtained with two different absolute meters. Based on our analysis, we expect that with an improvement of its long-term stability, the CAG will allow to calibrate the iGrav scale factor to better than the per mille level (1σ level of confidence) after only 1 day of concurrent measurements for maximum tidal amplitudes.
AB - We present a 27-day-long common view measurement of an absolute cold atom gravimeter (CAG) and a relative iGrav superconducting gravimeter, which we use to calibrate the iGrav scale factor. This allowed us to push the CAG long-term stability down to the level of 0.5 nm s- 2. We investigate the impact of the duration of the measurement on the uncertainty in the determination of the correlation factor and show that it is limited to about 3‰ by the coloured noise of our cold atom gravimeter. A 3-day-long measurement session with an additional FG5X absolute gravimeter allows us to directly compare the calibration results obtained with two different absolute meters. Based on our analysis, we expect that with an improvement of its long-term stability, the CAG will allow to calibrate the iGrav scale factor to better than the per mille level (1σ level of confidence) after only 1 day of concurrent measurements for maximum tidal amplitudes.
KW - Absolute atom gravimeter
KW - Absolute free fall corner cube gravimeter
KW - Relative superconducting gravimeter
KW - Scale factor
UR - http://www.scopus.com/inward/record.url?scp=85105593444&partnerID=8YFLogxK
U2 - 10.1007/s00190-021-01516-6
DO - 10.1007/s00190-021-01516-6
M3 - Article
AN - SCOPUS:85105593444
VL - 95
JO - Journal of geodesy
JF - Journal of geodesy
SN - 0949-7714
IS - 5
M1 - 62
ER -