Figure 5. above: Temperature vs. local refraction coefficient, below: Temperature vs. refracted zenith angle (assumed slope distance is 20m)

From

Updated Atmospheric Modelling of Refracted Zenith Angle Using Vertical Temperature Gradient for Refraction Coefficient

Mansoor Sabzali, Lloyd Pilgrim

Journal of Geosciences and Geomatics. 2023, 11(1), 11-20 doi:10.12691/jgg-11-1-2