[SFDXA] ARLP035 Propagation de K7RA

[William Marx]

> SB PROP @ ARL $ARLP035
> ARLP035 Propagation de K7RA
> 
> ZCZC AP35
> QST de W1AW  
> Propagation Forecast Bulletin 35  ARLP035
> From Tad Cook, K7RA
> Seattle, WA  August 26, 2016
> To all radio amateurs 
> 
> SB PROP ARL ARLP035
> ARLP035 Propagation de K7RA
> 
> Solar activity over the past week (August 18 to 24) was down
> compared to the previous week, with average daily sunspot number
> declining from 73.9 to 33.9, and average daily solar flux from 89.2
> to 79.6.
> 
> Average planetary A index increased from 6.9 to 9.7, while the
> mid-latitude number rose from 7.4 to 8.7.
> 
> The latest prediction (on August 25, 2016) shows expected solar flux
> at 78 on August 26 to 29, 80 on August 30 and 31, 85 on September 1
> to 3, 90 on September 4 to 10, 88 on September 11 and 12, 85 on
> September 13, 80 on September 14 and 15, then 78 and 75 on September
> 16 and 17, 80 on September 18 to 20, 84 on September 21 and 22, then
> 82, 80 and 78 on September 23 to 25, 75 on September 26 to 28, 80
> and 85 on September 29 and 30, and 90 on October 1 to 7.
> 
> Predicted planetary A index is 8, 5 and 8 on August 26 to 28, then
> 20, 25 and 12 on August 29 to 31, 10 on September 1 and 2, 12 on
> September 3 and 4, 15 on September 5 and 6, then 8 and 10 on
> September 7 and 8, 5 on September 9 to 12, 10 and 8 on September 13
> and 14, 5 on September 15 and 16, then 8, 7, 8, 12 and 8 on
> September 17 to 21, 5 on September 22 to 24, then 15, 25 and 18 on
> September 25 to 27, 15 on September 28 and 29, 12 on September 30 to
> October 1, and 15 on October 2 and 3.
> 
> Geomagnetic activity forecast for the period August 26 to September
> 21, 2016 from Petr Kolman, OK1MGW.
> 
> Geomagnetic field will be:
> Quiet on August 27
> Mostly quiet on August 26, September 9 to 11, 14 to 16, 18
> Quiet to unsettled on August 31, September 1 to 3, 6 to 8, 12, 17
> Quiet to active on August 28 to 30, September 4 and 5, 13, 19 to 21
> Active to disturbed on August (29 and 30)
> 
> Increases in solar wind from coronal holes are expected on August 28
> to 30, September 4 and 5, 12 and 13, 17, 19 to 21
> 
> Remarks: 
> - Parenthesis means lower probability of activity enhancement.
> 
> NOAA released an interesting bulletin regarding a new site for
> watching Total Electron Content of the ionosphere.
> 
> But first, their page defining TEC:
> 
> http://www.swpc.noaa.gov/phenomena/total-electron-content
> 
> And now, the announcement:
> 
> SWPC has deployed an updated and expanded version of its US Total
> Electron Content (US-TEC) model.  The model can now use more GPS
> stations, has increased coverage to all of North America and added
> scale information that indicates position error.  Now, two web pages
> are supported by the model, North American Total Electron Content:
> http://www.swpc.noaa.gov/products/north-american-total-electron-content
> 
> And, US Region Total Electron Content:  
> http://www.swpc.noaa.gov/products/north-american-total-electron-content-us-region
> 
> Both are currently hosted on our experimental pages for customer
> evaluation before being promoted formally to operations.  Promotion
> to operations is planned for 9/26.  At the same time the current
> US-TEC model will be decommissioned.  Comments on the updated model
> can be provided on our feedback page:  
> http://www.swpc.noaa.gov/content/contact-us
> 
> Andy Gudas, N7TP of Amargosa Valley, Nevada sent this article,
> another one about artificial ionosphere.
> 
> http://dailym.ai/2bcIR2N
> 
> For more information concerning radio propagation, see the ARRL
> Technical Information Service 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.  More good
> information and tutorials on propagation are at http://k9la.us/.
> 
> 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 August 18 through 24 were 54, 37, 12, 11, 33,
> 47, and 43, with a mean of 33.9.  10.7 cm flux was 82.4, 80.8, 78.1,
> 76.7, 80, 81.3, and 78, with a mean of 79.6.  Estimated planetary A
> indices were 7, 5, 4, 10, 5, 18, and 19, with a mean of 9.7.
> Estimated mid-latitude A indices were 8, 5, 4, 9, 6, 12, and 17,
> with a mean of 8.7.
> NNNN
> /EX