Fig. 9From: VHF radar measurements of momentum flux using summer polar mesopause echoesSuperscale mean square radial velocities (left), momentum fluxes (centre) and isotropies (right) for periods less than 12.8 h. Note that the isotropy scale is different from that in Fig. 8. The NE beam is somewhat noisy, and this contributes to the noise in the momentum flux. Note that the isotropy requires mean square radial velocities from four beams (NE, SW, N and W) to calculate, and it is particularly noisy. The colours for the momentum flux and isotropy indicate values uncorrected (green) and corrected (coral) for aspect sensitivityBack to article page