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The blurring around the trace is very commonly seen. The cause is unclear
but may be related to patches of lightly ionised E layer. |
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Between 2300 and 0000 there are clearly two different components. These are
the ordinary and extraordinary waves. |
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At 0350 the signal fades out. The ordinary wave fades first (at 0330
faintly) and the extraordinary wave fades later. Note how the fade is towards a lower
frequency as the ionised area travels away from the source. |
Between 0420 and 0500 a patch of nightime Es are observed. |
Wow! A beautiful example of the o and X waves starting at different times.
The frequency is high as the ionisation is approaching. These are F layer returns. |
The third line now starting here is the E layer. It takes longer
tobuild up to a sufficient level of ionisation than the F layer so "arrives"
later. |
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The E layer now masks any F layer returns. |
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Just E layer here but look at the X-ray flare giving a characteristic
return as is smashes into the E layer. The layer rapidly decends and then goes back up
again. The lower plot shows a GOES trace for the same period. |
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This blurring is probably some other sort of disturbance. |
