HF Radar Riometry

A Relative Ionospheric Opacity meter (riometer) measures the effect of high-energy particle precipitation into the Earth’s ionosphere. Usually riometers operate passively at 38.2 MHz and therefore can observe in daytime or through clouds. We aim to add riometry capability to our SuperDARN radar, operating at 12.57 MHz at SANAE. With 16 beams, this will give new observational capability in Antarctica using existing infrastructure to:
(1) Observe high-energy particle precipitation from geomagnetic storms, and
(2) Provide proof of riometer concept on our radar for use on other radars.