METHOD OF DETERMINING HEIGHT OF TRIGONOMETRIC LEVELLING POINTS

摘要

FIELD: physics.;SUBSTANCE: two-sided trigonometric levelling is carried out from point to be determined and two base points at a distance S with exceedance h₀, measured through high-accuracy geometric levelling. Difference in height caused by refraction effect is measured. Exceedance h₁ is measured in the direction of positive inclination and h₂ in the direction of negative inclination. Atmospheric pressure and air temperature are determined. Integral temperature gradients of air are calculated using formulas: where T is air temperature on the absolute temperature scale K, p is atmospheric pressure, Mbars. Transitional multipliers (coefficients) obtained on a test object (model) are determined. Corrections to height h₁, h₂ are calculated using the formula: ;EFFECT: higher accuracy and cost effectiveness of determining height.;1 dwg, 2 tbl