Spectra of the NH₃(1,1) (top) and (2,2) (bottom) inversion transitions obtained by averaging the emission over the HMC. The red solid curves are multiple Gaussian fits taking into account the hyperfine structure of the lines and two distinct velocity components (at about 58.2 km s^-1 and 61.8 km s^-1). The red dotted curves indicate the contribution of each velocity component to the total fit.