Comparison of PAS and SPAN-I for 1 January 2022 and 28 July 2023. a) Orbits of PAS and SPAN-I. The selection of radial distances (0.3 AU–0.5 AU) that is applied in the panels below is marked with grey shading. Panels b)–e) frequencies of occurences of solar wind velocities in SRF and RTN. An example of a single velocity bin selected based on ${\text{v}}_{\mathit{sw}}^{\mathit{SRF}}$ (Panel b)): ${\mathrm{Bin}}_{\mathit{ex}}^{SRF,PAS}=\left\{{\text{v}}_{sw,obs}^{SRF,PAS}|450\mathrm{km}/\mathrm{s}\le {\text{v}}_{sw,obs}^{SRF,PAS}<460\mathrm{km}/\mathrm{s}\right\}$ and (Panel d)): ${\mathrm{Bin}}_{\mathit{ex}}^{SRF,SPAN-I}=\left\{{\text{v}}_{sw,obs}^{SRF,SPAN-I}|450\mathrm{km}/\mathrm{s}\le {\text{v}}_{sw,obs}^{SRF,SPAN-I}<460\mathrm{km}/\mathrm{s}\right\}$ and based on ${\text{v}}_{\mathit{sw}}^{\mathit{RTN}}$ (Panel c)): ${\mathrm{Bin}}_{\mathit{ex}}^{RTN,PAS}=\left\{{\text{v}}_{sw,obs}^{RTN,PAS}|450\mathrm{km}/\mathrm{s}\le {\text{v}}_{sw,obs}^{RTN,PAS}<460\mathrm{km}/\mathrm{s}\right\}$ and (Panel e)): ${\mathrm{Bin}}_{\mathit{ex}}^{RTN,SPAN-I}=\left\{{\text{v}}_{sw,obs}^{RTN,SPAN-I}|450\mathrm{km}/\mathrm{s}\le {\text{v}}_{sw,obs}^{RTN,SPAN-I}<460\mathrm{km}/\mathrm{s}\right\}$ for PAS and SPAN-I, respectively. The set of all bins with 10 km/s widths from 350 km/s to 550 km/s is referred to as Bins. In panels b)–e), the distribution of the velocities of Bin_ex in the respective other FoR is included. Panels f)–k) show cumulative fractions of occurrences for PAS and SPAN-I for all velocity selection intervals in the respective set. In panels f), h), and j) the selection is based on $\text{v}={\text{v}}_{\mathit{sw}}^{\mathit{SRF}}$ and in panels g), i), and k) based on $\text{v}={\text{v}}_{\mathit{sw}}^{\mathit{RTN}}$. For PAS, shaded coloured areas mark the regime between N_BpS = 0.5 and N_BpS = 1. For SPAN-I, vertical dashed grey lines mark the lower boundary corresponding to N_BpS = 0.5.