Figure 1. Location of baseline 1 in the wider area of Athens (Google)

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