[600MRG] SID - Sudden Ionospheric Distrubances

Wed Apr 4 19:14:53 EDT 2018

Antenna into sound card running SpectrumLab is all that's needed to monitor
VLF for SIDs.  Here's a link to my past month of daytime VLF plots
monitoring several Navy transmitters:

https://www.dropbox.com/sh/t2abfmj70u2xfvk/AACaX0hUi7VR5H9JwLX2FPiqa?dl=0

As you can see they rotate down times for maintenance.

Night plots also:

https://www.dropbox.com/sh/fh8sez5d3vaweji/AABp5zota1ffPKlhECerMPkoa?dl=0

Dex
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