Energy levels, transition frequencies and Einstein A coefficients were taken from JPL. The collisional rates are taken from Danby et al. (1988) and were calculated for temperatures in the range from 15 to 300 K including energy levels up to about 420 cm-1 for collisions with para-H2. At present no extrapolated rate coefficients are made available.
More recent calculations by Maret et al (2009) only cover collisions of NH3 with para-H2. We will include these data as soon as calculations with ortho-H2 are completed.