38-Mc/s Radiation from Jupiter

Abstract

SOON after the discovery by Burke and Franklin¹ in 1954 of 22-Mc/s sporadic-type radiation from Jupiter, an attempt was made by F. G. Smith² to detect similar radiation at higher frequencies from old records taken with the Cambridge 38- and 81-Mc/s interferometers. Suitable records were available for 16 days in 1952 and 1953 at 38 Mc/s and for 10 days in 1955 at 81 Mc/s. In spite of the fact that both aerial systems were considerably more sensitive than anything normally utilized in the study of Jupiter at frequencies close to 20 Mc/s no emission was detected. For the next few years it was tacitly assumed by most workers, with the notable exception of Douglas³, that some frequency below 38 Mc/s represented an upper limit to the Jupiter radiation.