Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 6 18.  Predictions up to the next  14.0 days:

     Date     Time(AURA) AURA Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/20/2016   02:51:58   ( -79.30,-147.68) 06/20/2016   02:51:52  ( -79.30,-147.64)    0.69                 6
 06/20/2016   03:41:18   (  79.52,  21.48) 06/20/2016   03:42:30  (  79.51,  21.40)    1.92                72
 06/22/2016   18:19:02   (  79.15, 159.68) 06/22/2016   18:18:05  (  79.16, 159.81)    2.82                57
 06/22/2016   19:08:24   ( -79.36, -31.37) 06/22/2016   19:08:45  ( -79.35, -31.45)    1.84                21
 06/25/2016   10:35:28   (  79.21, -84.09) 06/25/2016   10:34:58  (  79.21, -84.04)    1.02                30
 06/25/2016   11:24:47   ( -79.53,  85.67) 06/25/2016   11:25:34  ( -79.54,  85.81)    2.88                47
 06/28/2016   02:51:53   (  79.30,  32.36) 06/28/2016   02:51:50  (  79.30,  32.36)    0.10                 3
 06/28/2016   03:41:00   ( -80.05,-154.49) 06/28/2016   03:42:14  ( -79.99,-154.29)    7.70                74
 06/30/2016   18:18:57   ( -79.16, -20.28) 06/30/2016   18:18:03  ( -79.17, -20.14)    2.93                54