The effect of the magnetic field on the accuracy of measurements with Worden and Sharpe gravity meters |
| |
| Authors: | Karel Divi? Vladimír Tobyá? Reviewer Z ?imon |
| |
| Institution: | (1) Institute of Geodesy, Prague;(2) Geophysical Institute, Czechosl. Acad. Sci., Prague |
| |
| Abstract: | Summary The effect of an additional homogeneous magnetic field with an intensity of 0–4.5 Oe on the Worden quartz gravity meter No. 961 and on Sharpe quartz gravity meters Nos 173 and 174 was tested. Whereas no effect was observed with the Worden gravity meter, the magnetic field had a measurable effect on both the Sharpe gravity meters. The largest deviation of the reading beam is caused by the horizontal component of the magnetic field which acts in the plane of oscillation of the gravity-meter arm. The Sharpe gravity meter No. 173 is considerably sensitive; a field of 0.2 Oe intensity, corresponding to the magnitude of the horizontal component of the geomagnetic field in mid-latitudes, causes an error in the measurement of gravity of as much as 0.08 mGal. With a view to the different behaviours of the individual quartz gravity meters of the same type in a magnetic field, it should prove expedient to carry out check measurements with all gravity meters and, with regard to the sensitivity of the gravity meter to the magnetic field and the required accuracy of the gravity determination, take into account this perturbing factor in field measurements, as well as laboratory tests of gravity meters. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
