mulian jartin let me completely destroy your mediocre, half-assed beliefs in the round earth system. Your snicker at the actual scientific data quoted by me, tells everybody that you have a very immature approach to science, the complete defeat of your arguments should serve you as a lesson...
(mulian, I speak several languages; in one of them, pacient = patient, how come you did not notice the fact that the explosion from Tunguska was seen from 1000 km distance?)
You are assuming a round shape; I will prove to you the shape of the surface is 100% flat, therefore my electrical signal model is correct, as I have described it.
GRIMSBY - TORONTO, 53 KM, 55 METER CURVATURE
Highest point of reference in the village, 45 meters (Beamer Falls Conservation Area).
In order to see the complete details from Toronto shoreline, you must ascend all the way to 220 meters.
If we go inland, 2 kilometers, we will ascend to about 170 meters; in order to see the complete details, we must ascend further to 237 meters.
NOW, THE COMPLETE DETAILS FROM TWO ZOOM PHOTOGRAPHS:
Normal day with no mirage
http://www.weatherandsky.com/Mirages/Mirages.html

Smaller format:


Original photos with no zoom:


In the zoom taken at nighttime, the complete details, even the lights from the small island in front of Toronto, details which could be seen only if we would ascend to 220 meters in Grimsby (place photographs were taken), or to 237 meters 2 km further inland.
In the zoom taken at daytime, we can see even the small 2-4 story buildings next to the shoreline, absolutely impossible on a round earth from 53 km distance; there is no point of reference in Grimsby of a height of 220 meters.