Travelling ionospheric disturbances.

Abstract

A general study of travelling ionospheric disturbances (T. I. D. 's) has been undertaken. In the theoretical aspect, the gravity-wave resonant mode has been studied and the concept of an ionospheric predictive function has been introduced. In the experimental aspect the digital data processing portion of the Dartmouth ionosonde network has been brought into operation and seven T.I.D. events have been analyzed with it. The data have been interpreted in light of Hooke's theory and substantial agreement has been found.