[TangerineSDR] Summer Sferics

Jonathan emuman100 at gmail.com
Mon Aug 1 23:29:36 EDT 2022


Hi All,

One of the really cool things about the summer is that the sferic density
is much, much higher than in the winter and it's so cool to see the
contrast between them.

Here is a spectrum plot from my VLF receiver. Aside from the NAA, NLK, and
NAU peaks, you see the elevated noise floor in the sferics band:
[image: Screen Shot 2022-08-01 at 10.29.59 PM.png]

Here is a 3 second spectrogram from the above timestamp:
[image: 2022-08-02_02-30-04p3s_summer_sferics.png]

The sferic density is quite impressive, but this is typical in the summer
months when there is much more lightning.

This is in contrast to the winter months when sferic density is much
lesser. The earth-ionosphere waveguide also treated us to some nice
multimode tweeks as well:
[image: tweeks_1-2-22_2_25.png]

Jonathan
KC3EEY
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