I noticed a change in the quality of the D layer of the inosphere
Taken by Rudolf Slošiar on March 9, 2021 @
Bojnice, Slovakia
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It is just the beginning of the next solar cycle. Here is a real record of how the SID monitor, the VLF receiver, can detect even the smallest changes, in the quality D of the ionosphere layer, during increased solar activity. This is how the SID monitor Rudy BASE, Bojnice, Slovakia recorded it
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