Top panel: neutral gas temperature (T3 = T/[103 K]), velocities for the neutral and ionized fluids (vn6,i6 = vn,i/[106 cm s−1]), and H2 OPR for the simple C-type shock model described in the text. Bottom panels: predicted H2 line profiles for the simple model described in the text, overlaid on the observed spectra for positions P1 and P2.