SZA dependence of the precipitation of solar wind protons and planetary oxygen ions and of solar wind hydrogen and planetary oxygen ENAs, on the dayside. The dotted lines show a ﹩{\cos }^{\gamma }\left(\mathrm{SZA}\right)﹩ dependence, with the best fit for γ for each species shown in the legend. The flux values are averaged over all SZAs in a range ±5^∘ from the markers.