Some of you know that among my various activities involving the
application of radio to space science, I operate a VLF receiver,
SIDsuite, that is a Gnu Radio based application.
Today, sunspot group 1302 has been putting on a great show, and I
wanted to share the plot of one of the VLF paths I monitor, which is
strongly affected by solar X-Ray flare activity, due to X-Ray flux
changing the refractive index of the ionosphere.
Shirleys Bay Radio Astronomy Consortium