TY - GEN
T1 - New absolute gravity measurements in New Zealand
AU - Fukuda, Yoichi
AU - Takiguchi, Hiroshi
AU - Kazama, Takahito
AU - Nishijima, Jun
AU - Gulyaev, Sergei
AU - Natusch, Tim
AU - Amos, Matt
AU - Stagpoole, Vaughan
AU - Pearson, Christopher
N1 - Funding Information:
Acknowledgements This research was partially supported by JSPS KAKENHI Grant Number 15H05205. Prof. Roger Bilham of Colorado University provided us useful information about the gravity measurements in South Alps. The gravity measurements were supported by many colleagues and staffs of Canterbury University, University of Otago, GNS Science, Auckland University of Technology and other institutions. We thank all those who were involved in this research.
Publisher Copyright:
© Springer International Publishing AG 2017.
PY - 2019
Y1 - 2019
N2 - To enhance and extend the absolute gravity (AG) measurements in New Zealand, we conducted new measurements using a FG5 (#210 of Kyoto University) in January and March 2016. The measurements in the North Island were made at two existing points (the Warkworth Radio Astronomical Observatory and Wellington A) and at one newly established point at the Wairakei Research Centre, Taupo. The gravity measurements in the South Island were made at five existing AG points; Godley Head, Mt John, the University of Otago, Helipad and Bealey Hotel. At each point more than 4,000 drops were made and AG values were determined with measurement uncertainties better than 3 μGal (mostly better than 2 μGal) at 130 cm instrument height. The values are compared with those of the 2015 campaigns. Although the differences of about 10 μGal were observed at Wellington A and Godley Head, those at the other points were within 5 μGal. At points in the Southern Alps we combined AG with relative gravity measurements and achieved good agreement with the 2015 results. Definite values for long-term gravity trends at the points in Southern Alps and Christchurch could not be obtained from the survey, but the results are consistent with those of the previous studies. Further measurements are planned to accurately determine these gravity changes.
AB - To enhance and extend the absolute gravity (AG) measurements in New Zealand, we conducted new measurements using a FG5 (#210 of Kyoto University) in January and March 2016. The measurements in the North Island were made at two existing points (the Warkworth Radio Astronomical Observatory and Wellington A) and at one newly established point at the Wairakei Research Centre, Taupo. The gravity measurements in the South Island were made at five existing AG points; Godley Head, Mt John, the University of Otago, Helipad and Bealey Hotel. At each point more than 4,000 drops were made and AG values were determined with measurement uncertainties better than 3 μGal (mostly better than 2 μGal) at 130 cm instrument height. The values are compared with those of the 2015 campaigns. Although the differences of about 10 μGal were observed at Wellington A and Godley Head, those at the other points were within 5 μGal. At points in the Southern Alps we combined AG with relative gravity measurements and achieved good agreement with the 2015 results. Definite values for long-term gravity trends at the points in Southern Alps and Christchurch could not be obtained from the survey, but the results are consistent with those of the previous studies. Further measurements are planned to accurately determine these gravity changes.
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U2 - 10.1007/1345_2017_18
DO - 10.1007/1345_2017_18
M3 - Conference contribution
AN - SCOPUS:85059002060
SN - 9783319953175
T3 - International Association of Geodesy Symposia
SP - 95
EP - 101
BT - International Symposium on Gravity, Geoid and Height Systems 2016 - Proceedings Organized by IAG Commission 2 and the International Gravity Field Service
A2 - Barzaghi, Riccardo
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
A2 - Vergos, Georgios S.
A2 - Pail, Roland
PB - Springer Verlag
T2 - International Association of Geodesy (IAG) symposium “Gravity, Geoid and Height Systems 2016”, GGHS 2016
Y2 - 19 September 2016 through 23 September 2016
ER -