Lloyd Viel Berkner (February 1, 1905 in Milwaukee, Wisconsin – June 4, 1967[1] in Washington, D.C.) was an American physicist and engineer. He was one of the inventors of the measuring device that since has become standard at ionospheric stations[2] because it measures the height and electron density of the ionosphere. The data obtained in the worldwide net of such instruments [3] were important for the developing theory of short wave radio propagation to which Berkner himself gave important contributions.