Layers of transmitter to receiver interaction zones, fly beyond the biosphere and stratosphere to the buffering ionosphere. Makes sense, communication pathways to a plane shall always be needed. Considering the many airline nations of the world today.
F2 layer = > 210 km, F1 layer = 140 – 210 km, E layer = 90 – 140 km, D layer = 50 – 90 km.
Licensing and regulation for sound emission, necessary, pertinent, considering all the excess noise that skips. Into and around functioning urban terrains, creation spurious signals and intermodulation, in effect altering the stasis of both communication relays for short term functionality and the stasis of natural life.
And it is easier to think bigger picture, alas, the complexities of maintaining a transmitter to receiver continuous communication shall always be simplex.
The importance of architecture, for better or worse. Both acoustic potential and hazard potential depending on the place and time, larger power’s using civilian shelter just to prove they are a mover and a shaker. Have brand power, giving the hertz that hurt.
For licensing, each antennae, building design and building codes come into play. What is the Hz potential as a receiver or is that building a transmitter at some scale. In the new world of relay running the past disturbances of being.
