Table 1 Effect of different assumed H angular scattering functions

From: Direct observations of negative ions on the Lunar surface by Chang'E-6

H scattering function

\({{{{\rm{Y}}}}}_{{{{{\rm{bs,H}}}}}^{-}}\) [%]

n0 [cm−3]

h0 [km]

As protons14

\(2.{5}_{-0.8}^{+1.2}\)

\(0.1{8}_{-0.03}^{+0.04}\)

9.7

As energetic neutral hydrogen6

\(2.{3}_{-0.7}^{+1.3}\)

\(0.1{7}_{-0.03}^{+0.04}\)

8.9

Isotropic

\(2.{0}_{-0.7}^{+1.0}\)

\(0.1{4}_{-0.02}^{+0.03}\)

8.8

Lambert’s emission

\(2.{4}_{-0.8}^{+1.2}\)

\(0.1{8}_{-0.03}^{+0.04}\)

10.7

  1. 1We use data from Lue et al.4 matching our solar wind speed range (275 km/s to 325 km/s) and solar zenith angle range (45°–60°).