[IRCA] Fw: ARLP007 Propagation de K7RA

["Art Blair" <artngwen@xxxxxxxxxx>]

----- Original Message ----- 
From: "W1AW Mailing List" <w1aw-list-request@xxxxxxxxxxxxxxxxx>
To: <artngwen@xxxxxxxxxx>
Cc: <W1AW List:>
Sent: Thursday, February 15, 2007 8:27 AM
Subject: ARLP007 Propagation de K7RA


> SB PROP @ ARL $ARLP007
> ARLP007 Propagation de K7RA
> 
> ZCZC AP07
> QST de W1AW  
> Propagation Forecast Bulletin 7  ARLP007
>>From Tad Cook, K7RA
> Seattle, WA  February 15, 2007
> To all radio amateurs 
> 
> SB PROP ARL ARLP007
> ARLP007 Propagation de K7RA
> 
> This bulletin is out a day early. Look for the next bulletin on
> Friday, February 23.
> 
> The sunspot number is currently 0, and the sun appears spotless, at
> least from this side. A week ago, helioseismic holography detected a
> spot on the far side of the sun, but whether it will fade away
> before reaching our side is unknown. Currently a solar wind is
> causing geomagnetic instability here on Earth, and the mid-latitude
> K index is 5 at 0600z on February 15.
> 
> This week brought a couple of messages about propagation software.
> Both noted that this bulletin frequently mentions W6ELprop. This is
> because it is easy to use and free, as well as being easily
> available. Each mentioned their favorite propagation software, and
> wondered why it hasn't been mentioned here.
> 
> Steve Hammer, K6SGH of Santa Barbara, California suggested VOAProp
> from Julian Moss, G4ILO. This is Windows freeware and serves as a
> front end or shell for the free VOACAP software. To run VOAProp, you
> download the setup file from, http://www.g4ilo.com/voaprop.html. As
> you install VOAProp, it directs the user to the VOACAP download
> site. When executing the VOACAP setup file, it is best to let it
> install in its default installation directory right at the root of
> the hard drive (C:\).
> 
> The web site has instructions for using VOAProp, and the first thing
> you'll want to do is set it up with your own latitude and longitude.
> Then you click on the Solar Data button, and let it download the
> predicted smoothed sunspot number for the month, in addition to
> current data from WWV. Then you can set up the month and year, and
> if you want, you can easily reset it for sunspot numbers higher or
> lower than the current one, to try out different scenarios.
> 
> The program has a nice map display, and above it are buttons for
> each of the 9 HF amateur bands, plus 160 meters. Yes, it does
> include 160 meters, as well as 60 meters and the so-called WARC
> bands at 12, 17 and 30 meters. Click a band-button, and it displays
> a contour map showing what signals should be like in all directions
> from your location. These are similar to contour maps showing
> elevation for terrain, or weather maps that display contoured areas
> for temperature or barometric pressure.
> 
> You can also see a 24-hour graph of probable signal levels between
> you and any particular location. Just click on the map to draw a
> line from you to any spot. You then click on Show Chart to bring up
> the graph.
> 
> K6SGH has his own useful resources on the web. Go to,
> http://www.k6sgh.com/ and look for a link to the Moxon Antenna
> Project, where you can find plans for simple but effective homebrew
> gain antennas based on designs by the late Les Moxon, G6XN.
> 
> Thomas Otterbein, DG8FBV was the other person who wrote, and he
> suggested WinCap Wizard from Jim Tabor, KU5S, which is also based on
> VOACAP. We'll try to get to that soon, but in the meantime check out
> the KU5S software at, http://www.taborsoft.com/.
> 
> If you would like to make a comment or have a tip for our readers,
> email the author at, k7ra@xxxxxxxxx
> 
> For more information concerning radio propagation, see the ARRL
> Technical Information Service at,
> http://www.arrl.org/tis/info/propagation.html. For a detailed
> explanation of the numbers used in this bulletin see,
> http://www.arrl.org/tis/info/k9la-prop.html. An archive of past
> propagation bulletins is at, http://www.arrl.org/w1aw/prop/. Monthly
> propagation charts between four USA regions and twelve overseas
> locations are at, http://www.arrl.org/qst/propcharts/.
> 
> Sunspot numbers for February 8 through 14 were 22, 11, 11, 0, 0, 0
> and 0 with a mean of 6.3. 10.7 cm flux was 78.4, 76.7, 75.9, 74.7,
> 73.6, 72.7, and 72.7, with a mean of 75. Estimated planetary A
> indices were 7, 4, 3, 2, 7, 17 and 18 with a mean of 8.3. Estimated
> mid-latitude A indices were 6, 3, 2, 1, 4, 13 and 16, with a mean of
> 6.4.
> NNNN
> /EX
> 
> 
>

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