Minimal temperature profile averaged over the first coronal hole stream in CR 2045. The freeze-in temperatures are derived from in situ observed ion ratios and the median over the coronal hole stream is shown together with the 15.9th and 84.1th percentile as error bars. The freeze-in order is determined by the median of the recombination and ionization rates C_i(T_f) + R_{i + 1}(T_f) at the freeze-in points. The recombination and ionization rates are based on a κ-function as electron velocity distribution with κ = 10.