Hi everyone,
Here is an article that caught Frank W3LPL’s interest, and might also be of interest to people here on the list. He said I could share this with you.
73 Nathaniel W2NAF
From: dono...@erols.com <dono...@erols.com>
Sent: Saturday, August 14, 2021 9:32 AM
Subject: Automated real time sporadic-E detection
This is one of the best articles I've ever read about automated real
time sporadic-E detection. There's a very big opportunity for citizen
scientists (hams) to make a big contribution to science by
implementing a global network of sporadic-E detection beacons and
receivers. 100 watt beacons would be desirable for improved
performance with omni-directional vertically polarized antennas,
perhaps with error correcting codes to further improve performance.
This could also provide rationale for at least a sliver 40 MHz ham
band.
On a related point, the article discusses well known aspects of
propagation that are widelunderstood in the professional community
but very little understood in the amateur community because
literature available to the amateur community doesn't cover it,
including the propagation chapters in the Antenna Handbook and the
Radio Amateur's Handbook.
Some of the well known aspects of propagation discussed in the
article but not adequately covered (or not covered at all) in amateur
publications includes:
- the positive and negative phases of geomagnetic storms
- every day E region blanketing of 40 meter F region propagation (usually called "absorption" by hams)
- frequent sporadic-e blanketing of the F region (usually called "absorption" by hams)
- frequent daytime F1 region blanketing of the F region during
summer daytime at mid latitudes and year round at low latitudes (usually called "absorption" by hams)
- night time sporadic-E that sometimes blankets the F region (usually called "absorption" by hams)
- night time F1 region blanketing of the F region (usually called "absorption" by hams)
73
Frank
W3LPL