Improving the accuracy of vertical angle observations

Abstract

The influences of instrumental errors, measurement errors, and the fluctuation of refraction angles,etc., on the observation accuracy of vertical angles are analysed. A new target used to observe the vertical angle was designed. Some measures are suggested to reduce the errors in observing vertical angles. They are proved to be effective by experiments.

Keywords

vertical angle / zenith angle / trigonometrical levelling / accuracy of observation / atmospheric refraction

References

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[3] XiaoFuhe. A new indirect adjustment method of trigonometric levelling. Journal of Central South Institute of Mining and Metallurgy, 1988, 24(1): 19-24(in Chinese)