The ARRL Letter reports
that the SuperDARN ionospheric research radar network has been identified by
the International Amateur Radio Union's Region 1 Monitoring Service as a source
of interference on 14.210 MHz and possibly other frequencies. This is in
addition to over-the-horizon radars, mostly based in Russia and China, that
have long been sources of QRM on the HF ham bands.
SuperDARN radar site in Saskatchewan
(Photo by Daryl Mitchell via
SuperDARN stands for Super Dual Auroral Radar Network, which operates 35 HF radars in both the Northern and Southern Hemispheres. They operate continuously to track the motion of charged particles in the ionosphere and help scientists better predict space weather hazards, such as geomagnetic storms.