Observations over water from 3 different locations showed CURVATURE that MATCH the calculations of EARTH as a SPHERE with radius of 6371 km.
Refraction calculator app https://www.metabunk.org/curve/
Target – Hadera power plant – technical info : https://translate.google.co.il/translate?hl=en&sl=iw&u=https://he.wikipedia.org/wiki/%25D7%2590%25D7%2595%25D7%25A8%25D7%2595%25D7%25AA_%25D7%25A8%25D7%2591%25D7%2599%25D7%259F&prev=search
Refraction info: https://www.dropbox.com/s/uonad2glir1nb7x/01%20refraction.docx?dl=0
Curvature calculator Refraction Formula free download : https://www.dropbox.com/s/23qx6fod7sjpicu/Earth%20Curvature%20Calculator.xlsx?dl=0
FLAT EARTH – EXPERIMENT – TELESCOPE