ALMA 1″-resolution images zooming into the edge of the Orion Bar in ¹²CO 3–2 (left panel, Goicoechea et al. 2016) and SH⁺ 1₀ –0₁ F = 1/2–3/2 line (middle panel, integrated line intensity). The right panel shows the H₂ v = 1–0 S(1) line (Walmsley et al. 2000). We rotated these images (all showing the same FoV) with respect to Fig. 1 to bring the FUV illuminating direction in the horizontal direction (from the right). The circle shows the DF position targeted with SOFIA in SH (20″ beam) and with the IRAM 30 m telescope in H₂S and H₃S⁺.