Long before Cable TV and Satellite Dish TV services existed Engineers at Pittsburgh's Westinghouse Electric came up with a scheme to provide Nationwide TV Signals by using surplus army planes as a form of flying transmission towers
https://en.wikipedia.org/wiki/Stratovision
Almost forgotten today . You may have heard old Amateur Radio Guys talk about it or even your great grandparents who may have even participated in the experiment .
Known as Stratovision In 1945 The Glenn L Martin Company and Pittsburgh's Westinghouse Electric
proposed using a Twin Engine PV-2 Aircraft flying at 25,000 ft with 250 watts of power at 107.5 Mhz
and 5000 watts on 514 Mhz to fly over selected areas and transmit TV signals in which Pittsburgh was one of the test citys.
From June of 1948 to Febuary 1949 test flights and broadcasts where performed followed up by a former Military B-29 Superfortress at 30,000 ft.
The tests where sucessful but never fully utilized but is still used on ocassion like in Vietnam.
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