[SFDXA] ARLP030 Propagation de K7RA

Fri Jul 23 22:00:07 EDT 2021

> SB PROP @ ARL $ARLP030
> ARLP030 Propagation de K7RA
> 
> ZCZC AP30
> QST de W1AW  
> Propagation Forecast Bulletin 30  ARLP030
> From Tad Cook, K7RA
> Seattle, WA  July 23, 2021
> To all radio amateurs 
> 
> SB PROP ARL ARLP030
> ARLP030 Propagation de K7RA
> 
> It is exciting to observe increasing sunspot activity.  Recently
> solar cycle 25 produced new sunspots frequently, and I watch them
> pop up every day on Spaceweather.com.  New sunspots emerged on July
> 14, 16, 17, 19 and 20, and two new ones appeared on July 21.  When I
> look at https://bit.ly/36TTO5t on July 22, our sun is peppered with
> spots, reminding me of past solar cycles.
> 
> Average daily sunspot numbers more than doubled from 21.3 last week
> to 48.9 during this reporting week, July 15 to 21.  Average daily
> solar flux went from 72.9 to 81.3.
> 
> Geomagnetic numbers held steady, with both the middle latitude and
> planetary A index averages at 6.4.
> 
> Predicted solar flux is 89 and 87 on July 23 to 24, 85 on July 25 to
> 30, 90 on July 31 through August 1, 85 on August 2, 75 on August 3
> to 12, then 78, 80 and 80 on August 13 to 15, and 85 on August 16 to
> 21, and 90 on August 22 to 28.
> 
> Predicted planetary A index is 18, 16 and 8 on July 23 to 25, 5 on
> July 26 and 27, 8 on July 28, 5 on July 29 through August 1, 8 on
> August 2, 5 on August 3 to 9, then 12 and 10 on August 10 and 11, 5
> on August 12 to 16, 8 on August 17 and 18, 5 on August 19 to 28, and
> 8 on August 29.
> 
> F. K. Janda, OK1HH sent his geomagnetic activity forecast for the
> period July 23 til August 19, 2021, before he takes a week of
> vacation:
> 
> "Geomagnetic field will be
> Quiet on: July 25, 30, August 7, 12 and 13
> Quiet to unsettled on: July 24, 28 and 29, 31, August 9, 14
> Quiet to active on: July 23, 26, August 1, 3 to 6, 11, 15 to 17, 19
> Unsettled to active: July 27, August 2, 8, 10, 18
> Active to disturbed: None predicted.
> 
> Remarks:
> Parenthesis means lower probability of activity enhancement.
> 
> Next Thursday, I will not compile a forecast of the Earth's magnetic
> field activity, because I will be walking on the highest mountains
> of my country-the Krkonoue Mountains.  Without the conveniences of
> civilization as computer or the Internet.  But I will have a good
> friends, camera and binoculars with me."
> 
> Go to OH6BG on QRZ.com to see his interesting VOACAP links.
> 
> I've been having fun using remote SDR receivers at
> http://kiwisdr.com/public/ to hunt for 10 meter beacons during the
> day.  This revealed much more sporadic-e propagation than I was
> previously aware of.
> 
> On Thursday, using the AB9MQ receiver in Normal, Illinois via
> http://ab9mq.hopto.org:8073/ I copied beacons KE5JXC/B in Kaplan,
> Louisiana on 28.2515 MHz, WD8INF/B in Lebanon, Ohio on 28.2525 MHz
> and KC5SQD/B in Missouri City, Texas on 28.2508 MHz.
> 
> You will notice on the https://www.qsl.net/wj5o/bcn.htm beacon
> roster that the listings resolve to 100 Hz, instead of 1 KHz.  This
> allows more of them to be packed together on the band.  The three
> beacons mentioned here today were all copied with the receiver tuned
> to the same frequency, and because they transmit on slightly
> different frequencies make them easy to copy.
> 
> A correction, I mentioned my new CW beacon, K7RA/B on 28.2833 MHz in
> last week's bulletin ARLP029.  The power output is actually 11
> watts, not 5 watts, I was reminded by UY5DJ/AA7DJ who generously
> built the beacon transmitter and controller.
> 
> N8II wrote:
> 
> "There was much intense sporadic-e, mostly within the USA and Canada
> on July 13 to 15 with double hop to MT, UT, WA, OR, BC, CA, NV and
> AZ.
> 
> Several times the skip zone shortened to stations less than 300
> miles away in NC, SC, KY, and OH.  I easily made over 100 QSOs. I
> worked Steve, VE2CSI in Sept-Iles, Quebec, grid FO60 a couple of
> times on ten meters and once on six meters, all SSB.
> 
> Things were fairly quiet until July 18 when Europe came through well
> on 10M starting just after 1200 UTC working 9A2U, Croatia, and Vlada
> YU4VLA Serbia, along with Italy, Bulgaria, Switzerland, Belgium,
> Scotland, and several German stations until 1319 UTC.
> 
> Just after 0000 UTC on the 19th, 10M SSB came alive with stations
> from Maine and the US 4th area.  I found TI5KMK in Costa Rica
> probably via Es, and also Puerto Rico.  Suddenly on the 21st upstate
> NY and New England stations with big signals appeared starting 2214
> UTC.  French stations F6ARC and F4AIF were found around 2240 UTC.
> 
> Today the 22nd was one of the best openings of the year to western
> EU on 10M.  I ran quite a few stations on 28430 KHz SSB after
> calling EI2IP and EI3GD in Ireland starting 1941 UTC.  Signal levels
> were very good and many stations were active.  The highlight was
> being called by Swedish hams SE5S and Hawk, SM5AQD who was peaking
> S9 running 1500W to a 3 stack of 8 elements each tri-band Yagis.
> Soon after MM0TFU in Scotland called in with a signal a bit better
> who I recall uses 400W to a 3 el Yagi.  This was the loudest Ian has
> been this year after several 10M QSOs. Around 0040 UTC, I worked
> WA2OOO on Long Island, NY less than 300 miles away with a strong
> signal as well as VO1VXC, Newfoundland."
> 
> From Dr. Tamitha Skov, WX6SWW earlier in the week:
> 
> https://youtu.be/PWIb1g-Jy18
> 
> For more information concerning shortwave radio propagation, see
> http://www.arrl.org/propagation and the ARRL Technical Information
> Service at http://arrl.org/propagation-of-rf-signals.  For an
> explanation of 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/.
> 
> Instructions for starting or ending email distribution of ARRL
> bulletins are at http://arrl.org/bulletins .
> 
> Sunspot numbers for July 15 through 21, 2021 were 22, 35, 53, 42,
> 45, 59, and 86, with a mean of 48.9.  10.7 cm flux was 73.5, 75,
> 77.4, 80.4, 82.6, 87, and 93.5, with a mean of 81.3.  Estimated
> planetary A indices were 10, 4, 4, 4, 7, 10, and 6, with a mean of
> 6.4. Middle latitude A index was 12, 5, 4, 5, 4, 9, and 6, with a
> mean of 6.4.
> NNNN
> /EX