[South Florida DX Association] ARLP002 Propagation de K7RA

[Bill Marx]

> SB PROP ARL ARLP002
> ARLP002 Propagation de K7RA
> 
> Geomagnetic conditions have been very, very quiet. This week has
> seen many periods when the K index, both planetary and mid-latitude,
> was 0 or 1. The average planetary/mid-latitude K index this week
> dropped from 5.4/5.1 (last week) to 3.3/3.4, respectively.
> 
> Of course, this low in the solar cycle, it is not surprising that
> sunspot numbers and solar flux dropped also. Average daily sunspot
> numbers dropped by 35 points from last week to 14.7, and solar flux
> was down 7.5 points to an average of 79.4.
> 
> Over the next week expect these conditions to stay the same, with
> possibly some slightly unsettled geo-activity on January 16.
> 
> Users of Canada's Dominion Radio Astrophysical Observatory data
> (such as me) were caught off-guard this week when our source of
> thrice-daily solar flux readings seemed to disappear from the net.
> 
> By Googling around and using a freeware program called Xenu Link
> Sleuth (a handy desktop web spidering application, which you can
> also find via a Google search) I finally discovered the new home of
> the Current Flux Archive. It now appears at
> http://www.drao-ofr.hia-iha.nrc-cnrc.gc.ca/icarus/www/current.txt.
> The observatory's servers seem to have moved from drao.nrc.ca to the
> much longer domain shown in the URL.
> 
> More 10 meter mail arrived this week. Glenn Stewart, N7NRA of Mesa,
> Arizona reminds us to check for beacons between 28.2 and 28.3 MHz.
> Glenn says, "If you hear beacons, there is a very good likelihood
> that you can raise a PSK31 contact or two by calling CQ on PSK at
> 28.120. If you get lucky and find half a dozen or so PSK signals at
> 28.120, and if some of them are strong, head for 28.345 - 28.350 and
> call CQ on Phone. Chances are excellent that you'll raise a phone
> contact or two. The band's not dead. The problem is that everyone is
> listening. No one is calling CQ. Give it a try!"
> 
> Also in Arizona, and on 10 meters, is Hank Pfizenmayer, K7HP in
> Phoenix, about 15 miles northwest of N7NRA. He said that on December
> 26, 2005 on 10 meters from 2137-2220z he worked KP2L, KP4DKE, S9SS,
> MM0SLH, VE3FGU and ZL1BYZ. The next day he worked ZL2BSJ, ZL1BYZ and
> ZL3KR. He says, "I listen just about every day to the 10 meter
> beacons, usually a couple times at least, and it would be easier to
> list days that I do not hear a beacon somewhere. I have found I can
> call CQ on CW for long periods with no activity at all even though I
> am hearing beacons all over the east coast."
> 
> Bob Skaggs, KB5RX in Santa Fe, New Mexico says he has been listening
> to 17 meters later, and observed, "When local sunset occurs, the
> band goes dead within 5 minutes. From 10 over 9 to nothing in less
> than 7 minutes. Not like when the sunspot activity is high where the
> band slowly fades."
> 
> If you would like to make a comment or have a tip for our readers,
> email the author at, k7ra at arrl.net.
> 
> For more information concerning radio propagation and an explanation
> of the numbers used in this bulletin see the ARRL Technical
> Information Service propagation page at,
> http://www.arrl.org/tis/info/propagation.html. An archive of past
> propagation bulletins is found at, http://www.arrl.org/w1aw/prop/.
> 
> Sunspot numbers for January 5 through 11 were 23, 24, 11, 11, 11, 11
> and 12 with a mean of 14.7. 10.7 cm flux was 83.4, 82, 79.2, 78.2,
> 77.6, 77.8, and 77.3, with a mean of 79.4. Estimated planetary A
> indices were 3, 6, 5, 4, 2, 1 and 2 with a mean of 3.3. Estimated
> mid-latitude A indices were 3, 6, 6, 5, 1, 2 and 1, with a mean of
> 3.4.
> NNNN
> /EX
> 
> 
>