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The Red River Valley
Amateur Radio Club

an affiliate of the ARRL
 
 
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Critical Frequency, Maximum Useable Frequency and Grey Line Maps

Internet Space Weather and Radio Propagation Forecasting Course.
SpaceWeather.com is accepting enrollments for this class NOW. The next class will commence on 16 June 2003.

 

Hourly STD Solar and Geophysical Report

ARRL Propagation


Propagation Information

 NEW!!!   AUSTIN IONOSONDE!
REAL TIME F-2 Layer information right here in Texas!

Near-Real-Time F2-Layer Critical Frequency Map


(Press "F5" to refresh. New images available about every 15 minutes)

Current F2 Layer Critical Frequency Map

 

Near-Real-Time MUF Map

Current F2 Layer Critical Frequency Map

 

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