Warm and hot population densities as a function of cometocentric distance between 2015-08-01 and 2015-10-20. The red dots show the 30 km medians of the data. The black solid line shows the power law fit to the median values using the whole cometocentric distance range, while the black dashed line indicates a power law fit to points when r_c < 450 km. 86% of the measured RPC-IES spectra were successfully fitted during the studied time interval.