On the Theoretical Study of F Scatter

Abstract

From several experiments carried out in the Far East and in South America, a statistical study is described on a relationship between the occurrences of F scatter and spread F. The theoretical aspect of the reflection mechanism of F scatter is treated from the standpoint of a field-aligned scattering blob. Moreover, blobs of ionization which have a longitudinal scale of the order of several hundred meters and a transverse scale of several meters are considered to be responsible for F scatter propagation. In the last part of this paper, possibility of F scatter is discussed from a geomorphological point of view.