Photoionization and dissociation dynamics of the NH$_2^{+}$ + H$^{+}$ and NH$^{+}$ + H$^{+}$ + H fragmentation channels upon single-photon double ionization of NH$_3$ at 61.5 eV. (arXiv:2008.11775v1 [physics.chem-ph]) http://arxiv.org/abs/2008.11775