J. A. Radcliffe

John A Radcliffe – "jar" – influential British Radio-Physicist.

He and his Cambridge University group did much pioneering work on the ionosphere, immediately prior to WW2. He was one of many leading radio scientists who worked at the Telecommunications Research Establishment during WW2. Martin Ryle, Bernard Lovell and Anthony Hewish were co-workers there, and Ryle and Hewish joined his radio-physics group at Cambridge after WW2.