Friends in Radio Land -
Those of you who enjoy seeing natural beauty, let me suggest
you take a look at the auroral photograph on p. 128 of the
January 2002 issue of Sky and Telescope.
The photograph was taken on the morning of October 12, from
central Wisconsin. It was from part of an auroral substorm,
started by a sudden geomagnetic impulse of about 30 nT and
characterized by a Ap-index of 33-. The colors (red, 6300A,
and green, 5577A) are due largely to emissions from metastable
states of atomic oxygen.
Top Band propagation was probably poor at the time but you
can't have everything.
73,
Bob, NM7M
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