Analysis of the SiO red-shifted line emission in the G24.78+0.08 outflow A observed with the IRAM 30-m antenna. The solutions for the observed SiO(5–4)/SiO(2–1) intensity ratio are shown in the n_H2–N(SiO) plot for non-LTE (RADEX) plane-parallel models at the labeled kinetic temperatures. Solid contours are for the measured ratios at the typical red- (+116 km s^-1) and blue-shifted (+106 km s^-1) velocities, after correction for a beam dilution derived assuming a source size of 3″ and 7″ (see text). The SiO(5–4)/SiO(2–1) ratios are 0.21 (3″; +116 km s^-1), 0.19 (3″; +106 km s^-1), 0.27 (7″; +116 km s^-1), and 0.30 (7″; +106 km s^-1). Dashed contours take into account the uncertainties.