с учётом поправки на кривизну земли и рефракцию. GRID в СК42, но "птичка" на "Учесть кривизну поверхности и рефрацию" недоступна.
If the surface has a defined spatial reference in projected coordinates and has defined Z units, the curvature and refraction correction option will be enabled. This takes into consideration the effect of earth curvature and the bending of visible light due to the atmosphere in the calculation. You should consider using this if the distance between observer and target points is more than a few kilometers.
