Decametric Wave-length Absorption resulting from the Nuclear Detonation of July 9, 1962

Abstract

FOLLOWING the high-altitude nuclear detonation on July 9 at Johnston Island there was observed a pronounced effect on the 10.006-Mc riometer data taken at the Air Force Cambridge Research Laboratories, Sagamore Hill Radio Observatory, in Hamilton, Massachusetts (lat. 42° 38′, long. 70° 49′). This riometer consisted of a Collins R–390A–URR receiver with a band-width of 1 kilocycle, and a dipole antenna oriented in an east–west direction.