The diffusion of ionized meteor trails in the upper atmosphere

Abstract The variations with height of the durations of radio echoes from ionized meteor trails are discussed. At wavelengths of 8.27 m and 4.35 m echo duration decreases approximately exponentially between altitudes of 80 and 100 km, in the manner predicted by diffusion theory. The diffusion coefficient between these heights varies between 10 4 and 10 5 cm 2 sec . These figures are very close to the theoretical estimates of diffusion coefficient, calculated from the rocket panel values of upper atmosphere air densities.