Reflected spectra in all directions in E² dN/dE form, with arbitrary units, as a function of energy E in keV for different shock heights: H = 10 km (black solid line), H = 8 km (blue dotted line), H = 5 km (red dashed line), H = 3 km (magenta dot-dashed line), and H = 1 km (green dash – dotted line). The dashed straight line is the input spectrum. The photons are emitted in a beam with m = 3. In the inset, we zoom into the absorption feature, with the horizontal axis linear.