On Gravity Survey

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Other Title
  • 重力測量
  • ジュウリョク ソクリョウ

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Concerning the gravimetric field survey with gravimeter of helical spring type (mainly for a LaCoste and Romberg gravimeter of geodetic type), drifts and calibrated scale constant of the gravimeter which seem to be affected to the accuracy of survey are discussed in detail. Mechanical, thermal and other shocks to the gravimeter should be avoided, because such shocks during the field survey usually result in poor results. Stability of the LaCoste and Romberg gravimeter of geodetic type used is rather good during the whole period of the survey, and it is able to determine the scale constant of the gravimeter with an accuracy of 1/1000 or better.

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