A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Results of the first North American comparison of absolute gravimeters, NACAG-2010
Abstract The first North American Comparison of absolute gravimeters (NACAG-2010) was hosted by the National Oceanic and Atmospheric Administration at its newly renovated Table Mountain Geophysical Observatory (TMGO) north of Boulder, Colorado, in October 2010. NACAG-2010 and the renovation of TMGO are part of NGS’s GRAV-D project (Gravity for the Redefinition of the American Vertical Datum). Nine absolute gravimeters from three countries participated in the comparison. Before the comparison, the gravimeter operators agreed to a protocol describing the strategy to measure, calculate, and present the results. Nine sites were used to measure the free-fall acceleration of g. Each gravimeter measured the value of g at a subset of three of the sites, for a total set of 27 g-values for the comparison. The absolute gravimeters agree with one another with a standard deviation of 1.6 μGal (1 Gal ≡ 1 cm s−2). The minimum and maximum offsets are −2.8 and 2.7 μGal. This is an excellent agreement and can be attributed to multiple factors, including gravimeters that were in good working order, good operators, a quiet observatory, and a short duration time for the experiment. These results can be used to standardize gravity surveys internationally.
Results of the first North American comparison of absolute gravimeters, NACAG-2010
Abstract The first North American Comparison of absolute gravimeters (NACAG-2010) was hosted by the National Oceanic and Atmospheric Administration at its newly renovated Table Mountain Geophysical Observatory (TMGO) north of Boulder, Colorado, in October 2010. NACAG-2010 and the renovation of TMGO are part of NGS’s GRAV-D project (Gravity for the Redefinition of the American Vertical Datum). Nine absolute gravimeters from three countries participated in the comparison. Before the comparison, the gravimeter operators agreed to a protocol describing the strategy to measure, calculate, and present the results. Nine sites were used to measure the free-fall acceleration of g. Each gravimeter measured the value of g at a subset of three of the sites, for a total set of 27 g-values for the comparison. The absolute gravimeters agree with one another with a standard deviation of 1.6 μGal (1 Gal ≡ 1 cm s−2). The minimum and maximum offsets are −2.8 and 2.7 μGal. This is an excellent agreement and can be attributed to multiple factors, including gravimeters that were in good working order, good operators, a quiet observatory, and a short duration time for the experiment. These results can be used to standardize gravity surveys internationally.
Results of the first North American comparison of absolute gravimeters, NACAG-2010
Schmerge, D. (author) / Francis, O. (author) / Henton, J. (author) / Ingles, D. (author) / Jones, D. (author) / Kennedy, J. (author) / Krauterbluth, K. (author) / Liard, J. (author) / Newell, D. (author) / Sands, R. (author)
Journal of Geodesy ; 86
2012
Article (Journal)
English
BKL:
38.73
Geodäsie
Results of the first North American comparison of absolute gravimeters, NACAG-2010
| Online Contents | 2012
The results of 10th International Comparison of Absolute Gravimeters (ICAG-2017)
| Online Contents | 2021
FFT swept filtering: a bias-free method for processing fringe signals in absolute gravimeters
| Online Contents | 2018
FFT swept filtering: a bias-free method for processing fringe signals in absolute gravimeters
| Online Contents | 2018