Propagation to the Western U.S.
The following comments from Bob Brown, NM7M, are regarding propagation
between the Western U.S. and Scarborough Reef:
Finally, we turn to the western states, having already dealt
with the W1-W3, W4, W5, W8 and W9 call districts. So for the
west, we have additional data:
Calls Region Distance Path
W6 Los Angeles, CA 11,900 km mid-latitude
W7 Seattle, WA 10,800 km sub-auroral
W0 Denver, CO 12,500 km sub-auroral
W0 Omaha, NE 12,800 km auroral
None of these paths go into the polar cap and thus would only
be disrupted by significant magnetic activity which would
give rise to auroral events. The paths from The Reef to Los
Angeles and Seattle are in complete darkness for about two
hours, from 1030 UTC to 1230 UTC while the other, longer
paths are fully dark for a brief time, centered around 1100
UTC. For low band operations, those times should be noted.
Otherwise, propagation would be best starting around local
dusk. At the present levels of solar activity, none of the
paths would show much promise above 14 MHz.
We'll look at the possibility of solar and magnetic activity
next time. This will involve seeing which active regions
will pass across the solar disk during the DXpedition.
For everything you need to know about basic HF radio propagation, you
should pick up a copy of Bob's book, The Little Pistol's Guide to HF
Propagation. It's available for $10 (plus $2 S&H) from Worldradio
Books, P.O. Box 189490, Sacramento CA 95818, U.S.A. Or, for on-line
information regarding radio propagation, check out the propagation links on the N4GN Home Page.
N4GN Home Page | BS7H 1995 Home Page | BS7H 1997 Home Page
Last modified 02 February 1999 by Tim Totten, firstname.lastname@example.org.