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1

On the reduction of geodetic and gravimetric measurements on technogenic and geodynamic polygons

Perovych Lev, Perovych Igor, Gorlachuk Valeriy

Geodesy and Cartography

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2020

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Vol. 69, no. 1

65--72

EN

When conducting geodetic and gravimetric measurements, there is a problem of projecting them to the reference surface. Since the gravitational field is inhomogeneous under the real conditions, the problem arises of determining the corrections to the measured values of gravitational acceleration in order to use the obtained data for the subsequent solutions of projection problems. Currently, the solution to this problem is performed using a Bouguer reduction, which requires information about the internal structure of the upper layer of the earth’s surface, topography, etc. The purpose of this study is to develop a methodological approach that would allow to determine the reduction (projection) corrections for gravitational acceleration on technogenic and geodynamic polygons without using data about the distribution of surface layer density and topography. The research process is based on the use of mathematical analysis methods and a wide range of experimental geodetic and gravimetric measurements. In the course of the performed researches, an algorithm was obtained and a practical implementation of the determination of the corrections in the measured values of gravitational acceleration on the basis of geodetic and gravimetric measurements was carried out at the certain geodynamic polygon in order to bring all corrections to one level surface.

2

Free-fall gravitational acceleration measurement using a pneumatically controlled catch-and-release-system in a semi-rotating vacuum chamber

Mokobodi T., Greeff P., Kruger O., Theron N. J.

Metrology and Measurement Systems

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2018

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Vol. 25, nr 4

689--699

EN

Knowledge of gravitational acceleration in metrology is required for traceable force and pressure calibrations, furthermore the redefinition of the SI base unit of kilogram requires absolute accomplishment of the gravitational acceleration. A direct free-fall gravimeter is developed using pneumatic grippers for test mass handling and a semi-rotary actuator for repositioning, i.e. automated re-launching. The catch and release system is powered by compressed air. This eliminates electric interferences around the test mass. A simplified method of signal capturing and processing is used on the designed gravimeter. A digital frequency trigger is implemented in the post processing algorithms to ensure that the signals are analysed from the identical effective height. The experimental results measured the site gravitational acceleration of 9.786043 ms -2 with a statistical uncertainty of ± 29 μs-2.

3

Design of Piezoelectric Gravimeter for Automated Aviation Gravimetric System

Korobiichuk I., Bezvesilna O., Tkachuk A., Chilchenko T., Nowicki M., Szewczyk R.

Journal of Automation Mobile Robotics and Intelligent Systems

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2016

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Vol. 10, No. 1

43--47

EN

The article presents and describes the structure of a new piezoelectric gravimeter of automated aviation gravimetric system (AGS), which has a higher accuracy (1mGal) than other types of gravimeters known to date and automated signal processing. It also describes the operation principle of a piezoelectric gravimeter and presents its mathematical model. There have been determined conditions under which the need to use lowpass filter in automated AGS is prevented.

4

Comparison of methods for gravity accleration measurement

Brezny P.

Modelling and Optimization of Physical Systems

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2008

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z. 7

7--10

EN

The article is dealing with the comparison of the chosen methods for gravity acceleration measurement. It publishes historical aspects and basic theory of gravity acceleration briefly. The results of the measurement are judged and the comparison of its accuracy is done at the end.

CS

Příspěvek se zabývá srovnáním vybraných metod měření gravitačního zrychlení. Stručně uvádí historické aspekty a základní teorii tíhového zrychlení. Výsledky měření jsou posouzeny a jejich nejistoty srovnány v závěru příspěvku.