Figure 6. above: Pressure vs. local refraction coefficient, below: Pressure vs. refracted zenith angle

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