One-dimensional models found by xRMS that return the lowest RMS. The green dotted lines labelled “Full” are the model profiles before downsampling and zero-padding. Both of these models are isothermal and isobaric. Left: slow moving models. The parameters of the fit are T = 8 kK; p = 0.1 dyn cm⁻²; slab width = 1000 km; H = 10 Mm; v_T = 8 km s⁻¹; and v_rad = 8 km s⁻¹. Right: fast moving models. The parameters of the fit are T = 6 kK; p = 0.5 dyn cm⁻²; slab width = 2000 km; H = 10 Mm; v_T = 13 km s⁻¹; and v_rad = 0 km s⁻¹.