[IRCA] Fw: ARLP004 Propagation de K7RA

["Art Blair" <artngwen@xxxxxxxxxx>]

----- Original Message ----- 
From: "W1AW Mailing List" <w1aw-list-request@xxxxxxxxxxxxxxxxx>
To: <artngwen@xxxxxxxxxx>
Cc: <W1AW List:>
Sent: Friday, January 26, 2007 5:43 AM
Subject: ARLP004 Propagation de K7RA


> SB PROP @ ARL $ARLP004
> ARLP004 Propagation de K7RA
> 
> ZCZC AP04
> QST de W1AW  
> Propagation Forecast Bulletin 4  ARLP004
>>From Tad Cook, K7RA
> Seattle, WA  January 26, 2007
> To all radio amateurs 
> 
> SB PROP ARL ARLP004
> ARLP004 Propagation de K7RA
> 
> This week (January 18-24) saw lower sunspot numbers (seven points
> lower, on average) than the previous week. Geomagnetic numbers were
> also lower, especially the past few days. January 22 through the
> first hours of today (January 26) at all latitudes had K index
> readings of 0 or 1.
> 
> Low geomagnetic activity will be good for this weekend's CQ World
> Wide 160-Meter CW Contest. But there is currently a flare-spewing
> sunspot just around the Sun's eastern limb, and when it swings into
> view we'll see solar flux about 10 points higher than now, and
> briefly some higher geomagnetic numbers. The planetary A index for
> January 26-31 is predicted at 5, 5, 15, 20, 20 and 15.
> 
> Geophysical Institute Prague predicts quiet conditions for January
> 26-27, unsettled January 28, unsettled to active January 29-30,
> unsettled January 31, and quiet to unsettled February 1.
> 
> Bob McQuarrie, ZL3TY writes that while we have perhaps had a
> not-so-great winter season for VHF E-skip in the Northern
> Hemisphere, down in the Southern Hemisphere they are having a
> wonderful spring and summer E-season, and comments "the best
> experienced in many years." His reports are from over a month ago,
> but last week he said "the good conditions continue."
> 
> Bob writes, "The 6m Sporadic E openings this summer have been the
> best I have experienced in the past 18 years of operating on the
> band. All mainland VK call areas have been worked and there have
> been many prolonged openings into VK6 and VK8. The band has been
> open to some part of VK every day since mid December."
> 
> He continues, "On the morning of 17 November, while operating meteor
> scatter tests to VK, 2m opened to VK2 briefly and 3 Sydney stations
> were worked."
> 
> Bob goes on to say, "The next 2m tropo opening started here at
> 1105am on Sunday 10 December with a QSO with VK2GKA, then the band
> remained open until late Monday night. On Sunday I had SSB/CW QSOs
> with 11 VK2s and 5 VK3s, also digital (JT65b) QSOs with 6 VK3s, on
> Monday the opening continued with SSB/CW QSOs with 15 VK2s, and 3
> VK4s and a digital QSO with VK4WS. On Sunday I had several 70cm QSOs
> with VK2FZ."
> 
> He ends with, "On Saturday 23 December there was an excellent
> Sporadic E opening starting at 911am NZT which lasted until 1145am.
> Stations worked included 11 VK2s, 3 VK1s and 3 VK7s. Conditions were
> so good an easy QSO was had with VK7HSE who was running 50W to a 1/4
> wave GP antenna."
> 
> Thanks, Bob.
> 
> Thanks also to N0AX's ARRL Contest Rate Sheet and N2IC for this tip.
> Go to the Meteorology and Training web site at,
> http://meted.ucar.edu/topics_spacewx.php for some wonderful online
> training on space weather. You will need the Adobe Flash Player from
> http://tinyurl.com/zgkz2 if you don't already have it. These courses
> are wonderfully illustrated and animated, and free.
> 
> 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 January 18 through 24 were 23, 15, 31, 18, 23,
> 18 and 15 with a mean of 20.4. 10.7 cm flux was 76.8, 76.3, 78.8,
> 78.6, 78.5, 79.3, and 80.4, with a mean of 78.4. Estimated planetary
> A indices were 16, 11, 7, 7, 3, 2 and 1 with a mean of 6.7.
> Estimated mid-latitude A indices were 9, 9, 6, 7, 2, 3 and 1, with a
> mean of 5.3.
> NNNN
> /EX
> 
>

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