  The relatively large value of $\theta_{13}$ established recently by the Daya
Bay reactor experiment opens the possibility to determine the neutrino mass
ordering with experiments currently under construction. We investigate
synergies between the NOvA long-baseline accelerator experiment with
atmospheric neutrino data from the India-based Neutrino Observatory (INO). We
identify the requirements on energy and direction reconstruction and detector
mass for INO necessary for a significant sensitivity. If neutrino energy and
direction reconstruction at the level of 10% and 10 degree can be achieved by
INO a determination of the neutrino mass ordering seems possible around 2020.
