Clarke was one of the true masters. He not only wrote great books but brought attention and respect to the entire genre of sci-fi. Before Clarke a government space program wouldn't have been caught dead asking for a sci-fi author's opinion.
"Clarke's most important scientific contribution may be in propagating the idea that geostationary satellites would be ideal telecommunications relays. He described this concept in a paper titled "Extra-Terrestrial Relays — Can Rocket Stations Give Worldwide Radio Coverage?", published in Wireless World in October 1945. The geostationary orbit is now sometimes known as the Clarke Orbit or the Clarke Belt in his honour."
"Clarke's most important scientific contribution may be in propagating the idea that geostationary satellites would be ideal telecommunications relays. He described this concept in a paper titled "Extra-Terrestrial Relays — Can Rocket Stations Give Worldwide Radio Coverage?", published in Wireless World in October 1945. The geostationary orbit is now sometimes known as the Clarke Orbit or the Clarke Belt in his honour."