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Fig. 5 | Earth, Planets and Space

Fig. 5

From: Occurrence features of intermediate descending layer and Sporadic E observed over the higher mid-latitude ionospheric station of Moscow

Fig. 5

Ionogram plots at successive times (LT): a 7:45, b 8:00, c 8:15, d 9:00, e 10:00, f 10:30, g 11:00, h 11:15, i 11:30, j 12:00, k 12:15, l 12:30, m 13:00, n 13:30 and o 13:45, during 18 December 2011 in Moscow station showing the downward movement of 2 IDLs. The 1st IDL starts at 8:00 LT and the 2nd four hours later at 12:00 LT, indicating a 4-h periodicity in IDL occurrence. IDL traces are indicated with blue dotted boxes

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