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Главная » 2020 » Апрель » 18 » Распространение de K7RA
21:46
Распространение de K7RA

18 апреля 2020 года

Солнечные пятна снова исчезли. Мы находимся в самом низу солнечного цикла, поэтому условия должны только улучшаться. Существует увеличение активности в эфире из-за большого количества людей, остающихся дома из-за Covid-19, и на этой неделе мы, похоже, переполнены сообщениями о спорадических открытиях электронной почты.

Последнее наблюдаемое солнечное пятно исчезло 5 апреля, поэтому еженедельные среднесуточные числа солнечных пятен снизились с 5,1 на прошлой неделе до нуля на этой отчетной неделе, с 9 по 15 апреля. Среднесуточный солнечный поток поднялся с 70,2 до 69,5.

Геомагнитные показатели также остаются спокойными, при этом среднесуточный расчетный планетарный индекс a составляет от 6,6 до 6,1, а среднеширотные числа, полученные из одного магнитометра в Вирджинии, до 5 с 5,3.

Прогнозируемый солнечный поток составляет 69 с 17 по 24 апреля, 70 с 25 апреля по 8 мая, 68 с 9 по 20 мая и 70 с 21 по 31 мая.

Прогнозируемый планетарный индекс А составляет 8 на 17 и 18 апреля, 12 и 8 на 19 и 20 апреля, 5 на 21 и 25 апреля, 10 на 26 и 27 апреля, 5 на 28 и 29 апреля, 8 на 30 апреля, 5 на 1-4 мая, затем 12, 5, 8 и 8 на 5-8 мая, затем 5 на 9-11 мая, 10 на 12 мая, 8 на 13-16 мая, 5 на 17-22 мая, 10 на 23 и 24 мая, затем 5, 5 и 8 на 25-27 мая и 5 на 28-31 мая.

Прогноз геомагнитной активности на период с 17 апреля по 12 мая 2020 г. от
Ф. К. Джанда, OK1HH:
"Геомагнитное поле будет
Тихо 20 и 21 апреля, 2 и 3 мая, 6 тихо до неустроенного 17 и 18 апреля, 22 до 24, 28 и 29 тихо до активного (25 апреля, 1 Мая, 5, 7 до 9, 12 мая) неустроенного до активного (19 апреля, 26 и 27, 30 мая, 4, 10 и 11 мая) активного до нарушенного: ничего.
Солнечный ветер усилится с 17 по 19 апреля, (20,) 26 по 28, 4 по 6 мая, 8 по 10
Замечания:
- Скобки означают меньшую вероятность повышения активности.
- Прогнозируемость изменений остается ниже, так как отсутствуют показатели."

HI8PLE wrote on April 11 from Dominican Republic:
"E's season started very well here, there has been a great activity on 144 MHz in the Caribbean. On April 9 2140 UTC worked PJ2BR, April 11 0027 UTC worked J69DS, at 1936 9Y4D, 9Z4DZ, finally April 12 at 0113 YY5BRB, all QSO using FT8 with 16 ele beam and 150 watts.

I have noticed that the conditions with the Lesser Antilles are steady and last all day and night, then, at dusk some TEP activity on 50 MHz with PY, LU, CE and CX. It seems to me that this will be a good E's season until June-July. Take care and please stayhome. 73, Edgar"

Danny Miller, KB8W (EN57) wrote:
"Yesterday, April 14, 2020 was the earliest Es/TEP activity that I have ever experienced here in EN57 (in the far NW corner of Michigan's Upper Peninsula)."

"I have been active for the past 10 years on 6 meters. I looked back in my logs and find that the first Es activity of the spring season is usually in early May, in 2019 my first contact was on May 10. But I have never even heard anyone via Es in April of any year (I have made contacts via meteor scatter in all months of the year)."

"6m opened for me at about 1710Z on April 14 when I copied CM2XM (EL83) on 50.313 MHz using FT8. Over the next 10 hours I worked 19 stations in New England, the Gulf coast and Cuba."

"According to PSKReporter, I was heard at 2202Z by TI2CDA (EJ79) and at 2201Z by HK4GSO (FJ26), those are the first TEP receptions that I have experienced. I was still hearing signals when I turned off the radio and went to bed at about 0400Z April 15."

"For me, a remarkable day as I run only 50 W to a 5 element Yagi."

AA8WH writes from Michigan, "Starting April 14 at about 2246 UTC, 6 meters was open on FT8. I worked NK4DX, in Ft. Lauderdale. When 6 died down, I moved down to 12 meters, and worked KN4NN in Crawfordville FL, W9OO in Harvey, IL. I then moved up to 10 meters and worked WZ9B in Noble IL, N4UXP in Atlanta GA, NT4J in Fuquay Varina NC, AB0S in Beloit KS.

At 0324 UTC, signal strengths were up to s-7 on the peaks, N5LFA in Potts Camp MS, WB4HMA in Nashville TN, N4JRS in Oakwood GA, J68HZ on St. Lucia.

10 meters continued to stay open well past 0400 UTC."

Lance Collister, W7JG wrote from Frenchtown, Montana:
"April 15 was the best 6m activity I have ever seen this early in the season. Unlike the eastern half of the country, out here in western Montana we normally are one or two hops away from linking into any high TEC activity and/or TEP propagation. Usually it seems a higher Kp index is required to cause 6m Es openings to the south from up here. But perhaps because the Kp index had been up to 3 on both April 14 and early on April 15 plus the time of year had something to do with it. Anyway, the 6m band was open from here in western Montana to the southeast for 9 hours, and I worked my first HC (Ecuador) station since I got on 6m 24 years ago. In addition to many domestic contacts, these DX stations were all worked on 50.313 using FT8 mode: XE1KK, XE1K, XE1EE, XE1H, TI2CDA,TG9AJR, TG9ANF, HP2DFA, HK3PJ, HC2DR, HC5VF, HC2AO, OA4DOS, LW2DAF, LU5CQC, LU2DPW, and CX6DRA."

"Normally up here, we wouldn't think a big Es opening before the end of May was possible! I am sure it helped that so many people were sequestered at home during the pandemic and able to be by their radios! This may be a once in a lifetime event, but it sure was memorable! Looking forward to the great 6m EME condx at the end of this month to pick up another ATNO on 6m."

Check out Lance's web page at http://www.bigskyspaces.com/w7gj/

Dave Bono, K6OAK of Fremont, California wrote, "We are in the middle of week 5 of Stay at Home restrictions here in the S.F. Bay Area. I thought I would use the opportunity of being home to make some improvements to my 6BTV ground mounted antenna. So I checked all my cable connections and added two 33 foot and a few shorter ground radials. Then I went into the shack shortly after 2200Z and fired up the Kenwood 590SG to see if there was any improvement. Listening to FT-8 there were signals on all bands 6 to 40M! Wow what a difference. I worked a bunch on 10M in short order at under 30 watts. I wish I could say it was the radials, but I'm sure it was just a coincidence that the bands opened up after being very stingy for the prior few days and weeks!"

Mike, W9NY operates from the top of a tall building in Chicago.

"To my surprise 10 meters and 6 meters were full of stations coming in to Chicago the evenings of April 14 and 15. Using a non-directional poorly matched antenna (G5RV for 20 meters up 450 feet) with 100 watts on SSB I worked several stations around the USA on 10 and some on 6 meters including Mexico. Can't wait for those sunspots!"

WB5AGZ wrote:

There was a whopper of an opening to Oklahoma on Tuesday April 14 from around 16:30 Central Daylight time until it all faded out near Midnight. As heard from a discone about 50 FT above the ground, signals on 10 meters from the East Coast of the US rolled in from the New York City Area down to North Carolina with lots of different signals fading in and out over each other which is quintessential Sporadic E behavior.

It all appears to have started rather suddenly at about 16:45 local time. The scanner was hearing business and public safety signals from local sources and then W4BWW in East Tennessee came in out of the blue talking to a station in Kansas which was inaudible from here, here being about 60 miles South of the Oklahoma/Kansas border.

That exchange was probably on 29.6 as it was simplex. The next signal was a piece of a repeater ID in North Carolina in which all one could hear was a female voice saying "North Carolina at the end of the ID. In a later fade-in, that turned out to be WB4BVA in Wilksborough, North Carolina.

After that, it was crazy-town on steroids. There was a MCW ID for a repeater in the 3rd or 4th call area that was too mutilated to read which later turned out to be N3AUY MD PL 4A when it faded in again.

I cheated and replayed the recording several times before I could copy the CW properly.

I am not used to a PL tone of 4A but that is what it sent. It's obviously in Maryland.

One of the signals in for a good portion of the evening was the WA3PBD repeater in Pitsburg, PA. It's full MCW ID is WA3PBD/R PGH and it's signal was present though occasionally blotted out by temporarily stronger signals from other repeaters before coming back in. Another briefly-heard system was the KD2WA repeater whose voice ID gives the PL tone as 110.9 Hz in a synthesized male voice.

I did possibly hear a Florida station but am not sure if I actually heard him on simplex or he was hitting one of the repeaters. The scanner is set to scan 29.6 through 29.680 in 20 KHZ steps and the band opening was good enough to make this a very chaotic experience.

Newcomers to amateur radio who heard this opening got to hear what

10 FM was like in previous sunspot maxima even though this is the bottom of the barrel for solar activity.

Also, what anybody hearing all this chaos may not realize is that there was once a time in which the 30 to 50 MHZ band was the work-a-day band for business and public safety communications in the Americas. The incredible Sun spot cycle of 1958 meant that hundreds of cities and small towns alike would jam each other's radio systems with full-quieting foreign traffic or "skip" as they tried to do routine business. The Boston Fire Department was full quieting in Oklahoma and surrounding states on 33.77 MHZ on just about any Winter day during Solar peaks.

Those openings spurred the mass moves to the 150 to 174 and up radio bands where most mobile business and emergency services now live.

Если вы хотите сделать комментарий или подсказку для наших читателей, напишите автору по адресу k7ra@arrl.net -да .

Дополнительную информацию о распространении радиосигналов смотрите в технической справочной службе ARRL по адресу http://arrl.org/propagation-of-rf-signals -да .

Описание номеров, используемых в этом бюллетене, см. В разделе
http://arrl.org/the-sun-the-earth-the-ionosphere 
-да .

Архив прошлых бюллетеней распространения находится по
адресу http://arrl.org/w1aw-bulletins-archive-propagation -да .
Более хорошая информация и учебные пособия по распространению находятся на
http://k9la.us/
.

Ежемесячные диаграммы распространения между четырьмя регионами США и двенадцатью зарубежными точками находятся на http://arrl.org/propagation -да .

Инструкции по запуску или завершению рассылки электронных бюллетеней ARRL находятся по адресу http://arrl.org/bulletins -да .

Номера солнечных пятен за период с 9 по 15 апреля 2020 года были: 0, 0, 0, 0, 0, 0, и 0, со средним значением 0. Поток 10.7 cm был 70.3, 69.2, 70.6, 70.8, 70.3, 68.9, и 68.4, со средним значением 69.5. Расчетные планетарные индексы а были 5, 5, 6, 7, 5, 8, и 7, со средним значением 6.1. Средняя широта индекс А был 5, 4, 4, 5, 4, 7, и 6, со средним значением 5.

• Все отчеты о распространении можно найти по адресу:
http://www.southgatearc.org/propagation

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