SEDs over full frequency range 0.408 GHz to 3000 GHz, for the longitude ranges a) l = 20°–30°; b) 30°–40°; c) 320°–330°; and d) 330°–340°. The points show the total emission, which is separated into free-free from the RRL and FastMEM data (dotted line), synchrotron from the free-free-corrected 408 MHz data (dashed line) and thermal dust (dot-dashed line). The total of the four components is given by the full line. AME is the residual (long-dash-dotted line). The conversion factor from intensity to brightness temperature at 28.4 GHz is 40 mK MJy^-1 sr.