Revisiting the Frequency Drift Rates of Decameter Type III Solar Bursts Observed in July – August 2002

Estimating for the frequency drift rates of type III solar bursts is crucial for characterizing their source development in the solar corona. According to Melnik et al. ( Solar Phys. 269 , 335, 2011 ), the analysis of powerful decameter type III solar bursts, observed in July – August 2002, found a linear approximation for the drift rate versus frequency. The conclusion contradicts reliable results of many other well-known solar observations. In this paper we report on the reanalysis of the solar data with a more advanced method. Our study shows that the decameter type III solar bursts of July – August 2002, as standard type III bursts, follow a power law in frequency drift rates. We explain the possible reasons for this discrepancy.