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[HCDX] Donât Stare Directly at the Sun
https://sites.google.com/site/zliangas/kaito-an200-antenna-review
Don´t Stare Directly at the Sun
Nov 4
http://www.rwonline.com/default.aspx?tabid=75&entryid=218
Written by: cross
11/4/2011 12:41 PM
That solar activity can have an effect on radio communications is well known. Sunspots, solar
flares, coronal mass ejections and other disturbances 93 million miles away at the center of
the solar system can cause problems for satellites circling earth as well as for shortwave and
other HF radio broadcasts.
When the energy of a solar flare reaches the Earth, it can temporarily increase the density of
the ionosphere, a phenomenon known as Sudden Ionospheric Disturbance or the Mo"gel-
Dellinger Effect. That in turn causes HF radio waves to be more completely absorbed by the
ionosphere, creating short fade outs or even complete blackouts for shortwave broadcasts
that can last for minutes or even hours.
Which is all an excuse to post this picture from NASA´s Solar Dynamics Observatory (SDO)
at Goddard Space Flight Center.
NASA's SDO Captures an X-class Flare
The bright light at the upper left is an X 1.9 Class solar flare, numbered AR1339, emitted
from the Sun yesterday (3:27 p.m. EDT on Nov. 3, 2011). According to NASA, disruptions to
some radio communications were noted on Earth about 45 minutes later. The SDO plans to
continue to watch this region of the Sun for similar activity over the next 10 days.Standard rig
: ICOM R75 / 2x16 V / m@h40 heads Sennheiser
Please read and distribute this 15 year research article http://tinyurl.com/5vzg7e
Please read my article on SINPO at http://tinyurl.com/yt7qjd
________________________
http://zlgr.multiply.com (radio monitoring site plus audio clips ) MAIN SITE
http://www.delicious.com/gr_greek1/@zach (all mypages !!)
........
Zacharias Liangas , Thessaloniki Greece
greekdx @ otenet dot gr ---
Pesawat penerima: ICOM R75 , Lowe HF150 , Degen 1102,1103,108,
Tecsun PL200/550, Chibo c300/c979, Yupi 7000
Antenna: 16m hor, 2x16 m V invert, 1m australian loop
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