Details
Translated title of the contribution | The Relative Gravimeter Calibration System Hannover for 10−4 Scale Determination |
---|---|
Original language | German |
Pages (from-to) | 140-150 |
Number of pages | 11 |
Journal | AVN Allgemeine Vermessungs-Nachrichten |
Volume | 125 |
Issue number | 5 |
Publication status | Published - 2018 |
Abstract
A best possible accuracy for the calibration of relative gravimeters is often required to achieve the objectives of state-geodetic and geo-scientific surveys. A scale inaccuracy for relative gravimeters of 1· 10−4 is striven for which allows, e. g., to detect small vertical movements of the Earth’s surface or to avoid misinterpretation of observations showing apparent variations due to uncertain calibration of the relative gravimeters. Recently, the Gravity Meter Calibration System Hannover has been improved with respect to its most important parts: the Harz calibration line (3 absolute gravimetric points) and the Vertical Gravimeter Calibration Line Hannover (VGCH, 20-storey building, 20 relative gravimetric points). For this Upgrade 2017, only “state-of-the-art” measurements with gravimeters from Scintrex (Canada) and ZLS Corporation (USA) have been used. For the two calibration lines, the Upgrade 2017 replaces the solution of 2004 which was based on measurements with LaCoste-Romberg instruments only. They were the measuring standard in the 70s and 80s. The older absolute gravity determinations in the Harz line have been completed with modern A10 observations in 2013. In the VGCH, the base connection 210– 370 (1st to 17th storey, elevator for transportation) has been obtained with a standard deviation of 11 nm/s2. The inaccuracy between adjacent points varies between 5 and 10 nm/s2 for the points below the 18th storey. The scale inaccuracy of the Harz calibration line as well as of the VGCH is estimated to be 2·10−4 (expanded uncertainty, confidence interval 95 %). A regular checking of the relative gravimeters with regard to instrumental air pressure effects and instrumentally caused scale instabilities is strongly recommended.
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)
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In: AVN Allgemeine Vermessungs-Nachrichten, Vol. 125, No. 5, 2018, p. 140-150.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Das Relativgravimeter-Kalibriersystem Hannover für 10−4-Maßstabsbestimmungen
AU - Timmen, Ludger
AU - Falk, Reinhard
AU - Gabriel, Gerald
AU - Lothhammer, Alexander
AU - Schilling, Manuel
AU - Vogel, Detlef
PY - 2018
Y1 - 2018
N2 - A best possible accuracy for the calibration of relative gravimeters is often required to achieve the objectives of state-geodetic and geo-scientific surveys. A scale inaccuracy for relative gravimeters of 1· 10−4 is striven for which allows, e. g., to detect small vertical movements of the Earth’s surface or to avoid misinterpretation of observations showing apparent variations due to uncertain calibration of the relative gravimeters. Recently, the Gravity Meter Calibration System Hannover has been improved with respect to its most important parts: the Harz calibration line (3 absolute gravimetric points) and the Vertical Gravimeter Calibration Line Hannover (VGCH, 20-storey building, 20 relative gravimetric points). For this Upgrade 2017, only “state-of-the-art” measurements with gravimeters from Scintrex (Canada) and ZLS Corporation (USA) have been used. For the two calibration lines, the Upgrade 2017 replaces the solution of 2004 which was based on measurements with LaCoste-Romberg instruments only. They were the measuring standard in the 70s and 80s. The older absolute gravity determinations in the Harz line have been completed with modern A10 observations in 2013. In the VGCH, the base connection 210– 370 (1st to 17th storey, elevator for transportation) has been obtained with a standard deviation of 11 nm/s2. The inaccuracy between adjacent points varies between 5 and 10 nm/s2 for the points below the 18th storey. The scale inaccuracy of the Harz calibration line as well as of the VGCH is estimated to be 2·10−4 (expanded uncertainty, confidence interval 95 %). A regular checking of the relative gravimeters with regard to instrumental air pressure effects and instrumentally caused scale instabilities is strongly recommended.
AB - A best possible accuracy for the calibration of relative gravimeters is often required to achieve the objectives of state-geodetic and geo-scientific surveys. A scale inaccuracy for relative gravimeters of 1· 10−4 is striven for which allows, e. g., to detect small vertical movements of the Earth’s surface or to avoid misinterpretation of observations showing apparent variations due to uncertain calibration of the relative gravimeters. Recently, the Gravity Meter Calibration System Hannover has been improved with respect to its most important parts: the Harz calibration line (3 absolute gravimetric points) and the Vertical Gravimeter Calibration Line Hannover (VGCH, 20-storey building, 20 relative gravimetric points). For this Upgrade 2017, only “state-of-the-art” measurements with gravimeters from Scintrex (Canada) and ZLS Corporation (USA) have been used. For the two calibration lines, the Upgrade 2017 replaces the solution of 2004 which was based on measurements with LaCoste-Romberg instruments only. They were the measuring standard in the 70s and 80s. The older absolute gravity determinations in the Harz line have been completed with modern A10 observations in 2013. In the VGCH, the base connection 210– 370 (1st to 17th storey, elevator for transportation) has been obtained with a standard deviation of 11 nm/s2. The inaccuracy between adjacent points varies between 5 and 10 nm/s2 for the points below the 18th storey. The scale inaccuracy of the Harz calibration line as well as of the VGCH is estimated to be 2·10−4 (expanded uncertainty, confidence interval 95 %). A regular checking of the relative gravimeters with regard to instrumental air pressure effects and instrumentally caused scale instabilities is strongly recommended.
KW - Instrumental air pressure effect
KW - Instrumental scale stability
KW - Relative gravimeter calibration
KW - Vertical Gravimeter Calibration Line Hannover
UR - http://www.scopus.com/inward/record.url?scp=85047088071&partnerID=8YFLogxK
M3 - Artikel
AN - SCOPUS:85047088071
VL - 125
SP - 140
EP - 150
JO - AVN Allgemeine Vermessungs-Nachrichten
JF - AVN Allgemeine Vermessungs-Nachrichten
SN - 0002-5968
IS - 5
ER -