Evidence for distributed scattering inDregion partial-reflection processes

Three tests are presented for discriminating between discrete scatter (single reflecting layer) and distributed scatter partial-reflection processes on the basis of experimental amplitude distributions. These tests are applied to data from noon conditions during four days in late October 1971 at Ottawa, Canada. We conclude that on each day distributed scattering was the dominant partial-reflection mechanism over some substantial altitude range between 60 and 80 km.