An experimental study of the variation of the tropospheric scattering cross section and air velocity with the position in space

An experimental study of the spatial homogeneity of the tropospheric permittivity and air velocity fields is presented. Knowledge regarding the homogeneity is imperative in order to measure the 4-dimensional spectrum of the permittivity fluctuations to be discussed in a later report. It is found that in most cases the scattering ability of the troposphere is enhanced with height. The variation of scattered power with position of the scattering volume along a horizontal direction varies very little. Similarly, it is shown that the wind velocity varies very little with height in the height region under consideration, while the velocity varies somewhat in a horizontal direction. Velocity and scattered power do not seem to correlate.