D1 is the horizontal distance along the path from the primary site to the point being corrected (in miles).Ecorr is the corrected elevation in feet.The equation can also be written using British units as: Ecorr = E + (D x is the distance from the point being corrected to the far end of the path, the equation can also be written in terms of the distances D1 and D2: Ecorr = E + (D1 x D2) / (1.5 x k) P is the distance from the site to the end of the path (in kilometers).D is the horizontal distance along the path from the primary site to the point being corrected (in kilometers).k is the curvature correction factor to compensate for atmospheric diffraction, typically 4/3 for most radio propagation applications (to ignore atmospheric diffraction, use a value of 1.0).Ecorr is the corrected elevation in meters. ![]() The formula used for elevation correction is: Ecorr = E + (78.5/k) x 10-3 x D x (P-D) TAP™ software allows elevation values to be corrected for earth curvature, including atmospheric diffraction effects. ![]() Added on: July 30, 2013, in: RF Engineering Articles
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