John Herbert Chapman (August 28, 1921 – September 28, 1979) was a Canadian space researcher. He started his career with his work on radio propagation and the ionosphere.
Chapman was a member of the Royal Society of Canada. He was also part of the National Research Council (NRC) Associate committee on Space Research, a council of the top Canadian space scientists. He also served on the International Union of Radio Science and the American Geophysical Union.
When the headquarters building of the Canadian Space Agency was completed in 1992, it was named the John H. Chapman Space Centre, in his honour.- Wikipedia