Robuta

https://angeo.copernicus.org/articles/31/1681/2013/angeo-31-1681-2013-metrics.html ANGEO - Metrics - Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation Abstract. Natural enhancements in the backscattered power of incoherent scatter radars up to 5 orders of magnitudes above the thermal backscatter are sometimes... high energyelectron precipitationangeometricsenhanced