Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 6 19.  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)
 06/20/2017   11:24:51   (  79.38, -95.29) 06/20/2017   11:24:27  (  79.39, -95.15)    3.06                24
 06/20/2017   12:14:14   ( -79.54,  73.45) 06/20/2017   12:15:08  ( -79.53,  73.32)    2.86                54
 06/23/2017   02:52:04   ( -78.89,-150.09) 06/23/2017   02:50:50  ( -78.91,-150.18)    2.98                74
 06/23/2017   03:41:17   (  79.39,  20.66) 06/23/2017   03:41:21  (  79.38,  20.57)    2.06                 4
 06/25/2017   19:08:22   ( -79.26, -31.97) 06/25/2017   19:07:35  ( -79.26, -31.93)    0.93                47
 06/25/2017   19:57:42   (  79.47, 137.10) 06/25/2017   19:58:13  (  79.48, 137.09)    0.32                31
 06/28/2017   11:24:49   ( -79.26,  83.94) 06/28/2017   11:24:30  ( -79.25,  83.80)    3.08                19
 06/28/2017   12:14:05   (  79.63,-105.95) 06/28/2017   12:15:03  (  79.63,-105.83)    2.34                58
 07/01/2017   02:51:52   (  79.12,  31.29) 07/01/2017   02:50:43  (  79.12,  31.27)    0.40                69