Figure 3. Computed refraction coefficient k with proposed models versus measured from survey data

From

Empirical Modelling of Refraction Error in Trigonometric Heighting Using Meteorological Parameters

D. Gaifillia, V. Pagounis, M. Tsakiri, V. Zacharis

Journal of Geosciences and Geomatics. 2016, 4(1), 8-14 doi:10.12691/jgg-4-1-2