Measurement of gravitational acceleration values at the calibration laboratories in Korea

S.Y.Woo, I.M.Choi, H.W.Song

Abstract

The most important conversion factor between mass and force is the value <i>g</i> of the acceleration due to gravity. This can be measured with an absolute or relative gravimeter. It depends on the latitude and height above sea level. Values of <i>g</i> at many calibration laboratories in Korea are measured with a relative gravimeter, Model G manufactured by La Coste & Romberg in USA. To improve the measurement performance of the gravimeter, we attached an optical magnifying system instead of microscope eyepiece, which consists of CCD camera and LCD display. This optical system showed to be sufficiently convenient and accurate to provide a practical alternative to the traditional microscopic eyepiece. The observed value of <i>g</i> spans a range of 0.03% between the northernmost and the southernmost calibration laboratory in Korea. In this paper, the improved performance and the detailed gravity measurement results are given.

Keywords

gravity, acceleration, gravimeter, calibration

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IMEKO-TC3-2007-112u.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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