Details
| Original language | English |
|---|---|
| Pages (from-to) | 155-162 |
| Number of pages | 8 |
| Journal | AVN Allgemeine Vermessungs-Nachrichten |
| Volume | 127 |
| Issue number | 4 |
| Publication status | Published - 2020 |
Abstract
A reliable evaluation of four Scintrex CG-6 gravimeters was done with respect to the stability of the calibration, measurement uncertainty, repeatability, and daily drift behaviour. An uncertainty on the 10 nm/s2 level for adjusted g-results is striven for. Measurements were performed on the Vertical Gravimeter Calibration Line Hannover (VGCH, 192 μm/s2 range, 20-storey building, 10 μm/s2 interval, 2 · 10−4 expanded uncertainty of the scale). The achieved standard deviations of the adjusted calibration factors are in the order of 2 to 6 · 10−5, and the maximum variations between two calibration results for a single instrument varied between 2 to 7 · 10−4. Therefore, the stability of the scale factor (calibration) of a CG-6 instrument has to be controlled by the user before and after the microgravimetric survey. The transportation drift over some hours or a working day shows partly short-term variations with an impact of up to 100 nm/s2 which can only be identified and controlled by sufficient repeated observations on same points. The manufacturer Scintrex Ltd. solved the problematic nature of an instrumental air pressure effect but a test especially for older CG gravimeters is still recommended. Overall, the CG-6 gravimeters meet fully the expectations.
ASJC Scopus subject areas
- Social Sciences(all)
- Geography, Planning and Development
- Engineering(all)
- Civil and Structural Engineering
- Earth and Planetary Sciences(all)
- Earth and Planetary Sciences (miscellaneous)
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: AVN Allgemeine Vermessungs-Nachrichten, Vol. 127, No. 4, 2020, p. 155-162.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigation of Scintrex CG-6 Gravimeters in the Gravity Meter Calibration System Hannover
AU - Timmen, Ludger
AU - Rothleitner, Christian
AU - Reich, Marvin
AU - Schröder, Stephan
AU - Cieslack, Matthias
N1 - Funding Information: The Scintrex CG-6#171 gravimeter was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC – 2123 QuantumFrontiers – 390837967 in summer 2019. We thank Hans-Martin Schuler from IGM Messtechnik GmbH (Überlingen, Germany) for his support concerning questions and problems with Scintrex meters.
PY - 2020
Y1 - 2020
N2 - A reliable evaluation of four Scintrex CG-6 gravimeters was done with respect to the stability of the calibration, measurement uncertainty, repeatability, and daily drift behaviour. An uncertainty on the 10 nm/s2 level for adjusted g-results is striven for. Measurements were performed on the Vertical Gravimeter Calibration Line Hannover (VGCH, 192 μm/s2 range, 20-storey building, 10 μm/s2 interval, 2 · 10−4 expanded uncertainty of the scale). The achieved standard deviations of the adjusted calibration factors are in the order of 2 to 6 · 10−5, and the maximum variations between two calibration results for a single instrument varied between 2 to 7 · 10−4. Therefore, the stability of the scale factor (calibration) of a CG-6 instrument has to be controlled by the user before and after the microgravimetric survey. The transportation drift over some hours or a working day shows partly short-term variations with an impact of up to 100 nm/s2 which can only be identified and controlled by sufficient repeated observations on same points. The manufacturer Scintrex Ltd. solved the problematic nature of an instrumental air pressure effect but a test especially for older CG gravimeters is still recommended. Overall, the CG-6 gravimeters meet fully the expectations.
AB - A reliable evaluation of four Scintrex CG-6 gravimeters was done with respect to the stability of the calibration, measurement uncertainty, repeatability, and daily drift behaviour. An uncertainty on the 10 nm/s2 level for adjusted g-results is striven for. Measurements were performed on the Vertical Gravimeter Calibration Line Hannover (VGCH, 192 μm/s2 range, 20-storey building, 10 μm/s2 interval, 2 · 10−4 expanded uncertainty of the scale). The achieved standard deviations of the adjusted calibration factors are in the order of 2 to 6 · 10−5, and the maximum variations between two calibration results for a single instrument varied between 2 to 7 · 10−4. Therefore, the stability of the scale factor (calibration) of a CG-6 instrument has to be controlled by the user before and after the microgravimetric survey. The transportation drift over some hours or a working day shows partly short-term variations with an impact of up to 100 nm/s2 which can only be identified and controlled by sufficient repeated observations on same points. The manufacturer Scintrex Ltd. solved the problematic nature of an instrumental air pressure effect but a test especially for older CG gravimeters is still recommended. Overall, the CG-6 gravimeters meet fully the expectations.
KW - Accuracy
KW - Gravimeter calibration
KW - Instrumental air pressure effect
KW - Relative gravimetry
KW - Scintrex CG-6
KW - Transportation drift
UR - http://www.scopus.com/inward/record.url?scp=85091505102&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85091505102
VL - 127
SP - 155
EP - 162
JO - AVN Allgemeine Vermessungs-Nachrichten
JF - AVN Allgemeine Vermessungs-Nachrichten
SN - 0002-5968
IS - 4
ER -