RADIO EMISSION. Emissions of the sun in radio wavelengths from centimeters
to dekameters, under both quiet and disturbed conditions.
Type I. A noise storm composed of many short, narrow-band bursts
in the metric range (300 - 50 MHz).
Type II. Narrow-band emission that begins in the meter range
(300 MHz) and sweeps slowly (tens of minutes) toward deka-
meter wavelengths (10 MHz). Type II emissions occur in
loose association with major FLAREs and are indicative of
a shock wave moving through the solar atmosphere.
Type III. Narrow-band bursts that sweep rapidly (seconds) from
decimeter to dekameter wavelengths (500 - 0.5 MHz). They
often occur in groups and are an occasional feature of
complex
solar ACTIVE REGIONs.
Type IV. A smooth continuum of broad-band bursts primarily in the
meter range (300 - 30 MHz). These bursts are associated with
some major flare events beginning 10 to 20 minutes after the
flare maximum, and can last for hours.
Jeff
ve3ios
----- Original Message -----
From: <WmLB@prefer.net>
To: <tentec@contesting.com>
Sent: Saturday, March 16, 2002 3:45 PM
Subject: [TenTec] R1 and R2 Levels... ???
> Not Ten-Tec related, but I figure someone on this list has probably
> got the answers.
>
> The propagation reports are using new terminology (to me anyway) to
> forecast conditions related to radio propagation. "R1 Level" or "R2
> Level" (maybe there is an R3 and a R4 too)
>
> Does anyone know where I can find a explanation of these terms?
>
>
> Bill
>
> Costa Mesa, CA
> Amateur Radio Station: W6WLB
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>
>
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