sentences:  Because at that time international telephony was very expensive and hard to arrange, and transoceanic television was impossible, he decided it should be some kind of communication satellite since these problems could be solved that way.He began to research what kind of communication satellite system would work best for this purpose.At the time, Rosen was unaware of science writer Arthur C. Clarke's 1945 description of a geosynchronous satellite, but he was aware of the conventional wisdom regarding geostationary satellites, expressed most stridently by the highly regarded Bell Labs, at that time the world's leading communications R&D entity, in a March 1959 IRE Journal titled “Transoceanic Communications Via Satellites,” written by John Pierce and Rudy Kompfner.