[SFDXA] ARLP047 Propagation de K7RA

[Bill Marx]

ZCZC AP47
QST de W1AW
Propagation Forecast Bulletin 47  ARLP047
 From Tad Cook, K7RA
Seattle, WA  November 23, 2011
To all radio amateurs

SB PROP ARL ARLP047
ARLP047 Propagation de K7RA

Due to the Thanksgiving holiday tomorrow, the bulletin is coming out two 
days early this week.  There is an overlap of one day on the data 
reported at the end of the bulletin. Look for another bulletin
on Monday which will have more overlap, and Propagation Forecast 
Bulletin ARLP049 a week from Friday will have still more overlap. This 
is because the end of the bulletin always has seven days of
data, to keep it compatible with the Solar Data Plotting Utility created 
by Scott Craig, WA4TTK. You can download the utility for free at 
http://www.craigcentral.com/sol.asp. The Utility can handle
redundant data, but it must remain in a certain format in order for it 
to glean data from the bulletin automatically.

Not much in the way of solar excitement this week, except there are many 
sunspots, but the solar activity in terms of flares or coronal mass 
ejections is low. The overlapping (by one day) average sunspot numbers 
in this bulletin declined 21 points to 124

Expect good conditions for the CW weekend of the CQ Worldwide DX 
Contest, November 26-27.

The latest prediction from USAF/NOAA shows solar flux at 140 on November 
23, 145 on November 24-27, 150 on November 28-29, 155 on November 30, 
160 December 1-2, and 165 December 3-7.  Predicted planetary A index is 
5 on November 23-27, 7 on November 28-29, then 5 on November 30 to 
December 24.

Larry Goolsby, AA4JI of Fayetteville, Tennessee wrote on November 18: 
"This whole week on forty meters during the Triple H Net on 7.190 at 
0700 UTC I and others have been working central Australia
with strong 57 reports. Repeatedly I worked VK2NRB Bob and VK2TTP Peter 
using just 100 watts and a wire dipole at 30 ft. each morning, and also 
Europe is starting along with some Asia contacts. New Zealand has been 
strong along with V21N in Antigua."

If you would like to make a comment or have a tip for our readers, email 
the author at, k7ra at arrl.net <mailto:k7ra at arrl.net>.

For more information concerning radio propagation, see the ARRL 
Technical Information Service web page at, 
http://arrl.org/propagation-of-rf-signals. For an explanation of the 
numbers used in this bulletin, see 
http://arrl.org/the-sun-the-earth-the-ionosphere. An archive of past 
propagation bulletins is at 
http://arrl.org/w1aw-bulletins-archive-propagation. Find more good 
information and tutorials on propagation at 
http://myplace.frontier.com/~k9la/ <http://myplace.frontier.com/%7Ek9la/>.

Monthly propagation charts between four USA regions and twelve overseas 
locations are at http://arrl.org/propagation.

Instructions for starting or ending email distribution of ARRL bulletins 
are at http://arrl.org/bulletins.

Sunspot numbers for November 16 through 22 were 126, 122, 137, 149, 101, 
101, and 132, with a mean of 124. 10.7 cm flux was 142.3, 147.7, 144.4, 
139.6, 139.9, 141.1, and 142.4, with a mean of 142.5. Estimated 
planetary A indices were 2, 3, 2, 1, 2, 5, and 6, with a mean of 3. 
Estimated mid-latitude A indices were 3, 2, 1, 1, 2, 5, and 7 with a 
mean of 3.
NNNN
/EX