Fig. 5
At the left, for event 8 changes are shown in: a ϕ ′, P l , and λ ′ of scattered signals; b in P l in five longitude sectors. Those obtained from beam 0 data are shown by black points. At the right, for event 9 variations are shown in: c ϕ ′ for all scattered signals which composed the event; d P l , ϕ ′, and λ ′ for those with V D >0; e V D ; f P l , ϕ ′, and λ ′ for the signals with V D <0. Signals with positive/negative V D are shown by black circles/points. Gray points show the signals that can be attributed to the ordinary daytime ground backscatter signals