The Spectrum from 4,91 GHz - 6,1 GHz in Byron, Athens ~280m altitude.
280m is pretty high for Athens.
Athens is at sea level and most buildings are around 4 floors tall.
I used a 10 dBi omni antenna with 10 degree Vertical and 360 degree Horizontal Beamwidths and best for 5400 - 5850 MHz according the the manufacturer.
The antenna Radiation E and H Planes
Spectrum Usage around 5GHz - 6GHz
It was made with a RouterOS powered machine using the command
/interface wireless spectral-history 5GHz-AP-KAREAS range=4910-6110where 5GHz-AP-KAREAS is the name of the wireless interface connected to the omni antenna.
The wireless interface is the one coming with the 912 mikrotik boards.
A few pictures from the location --the ipduh AWMN node
You can see Acropolis in this picture
Spectrum Usage 5GHz Athens Byron