I am curious about real life experiences, but also about theoretical thoughts about the following:
If a Gateway is located on a mountain, lets say 500 vertical meters above the surrounding terrain, whats the typical range that can be reached using SF7 (or SF8, 9, a “good” SF)?
If I am not mistaken, the total link budget of SF7 is 137db. Hacking this data into a free space loss calculator results in a theoretical possible distance of about 200km. Of course, this is not realistic. But, seeming more realistic, if the signal has to go through a single concrete wall (20dB absorption), SF7 could still achieve 20km range.
So, regarding gateway placement, it seems to me that a gateway further away but on very elevated ground (lets say 5 or even 10km away from a city) could produce much better connectivity results than a gateway directly in the city but level with the typical building height.
Much better connectivity results in terms of a good spreading factor as well as in terms of better overall coverage.
Any experiences /thoughts on that?
Thanks & best regards