Three contributions of the spherically symmetric, static part of the atmospheric refractivity , and to the two-way frequency transfer correction (59) and their sum as functions of the satellite zenith angle θ. The example is evaluated for ground-to-satellite transfer through an isothermal atmosphere in hydrostatic equilibrium with an observer on the ground located at the equator with r_A = 6371 km and a satellite moving on a circular orbit in the equatorial plane at a radius of r_A + 408 km in the direction of the rotation of the Earth.