Slow Drift Solar Radio Bursts: Harmonic Frequency Ratios, Solar Longitude Dependence, and Frequency Drift Rates

Abstract

Frequency ratios of second harmonic to fundamental bands are determined for 19 slow drift bursts. The ratios measured at the high frequency edges of the bands yield a mean value of 2· 00, whereas the mean value of the low frequency edge ratios is significantly lower than 2.