Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 17.  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)
 07/19/2017   19:08:22   (  79.15, 147.37) 07/19/2017   19:07:32  (  79.15, 147.32)    0.97                50
 07/19/2017   19:57:41   ( -79.48, -42.86) 07/19/2017   19:58:08  ( -79.48, -42.82)    0.83                27
 07/22/2017   11:24:47   (  79.27, -96.03) 07/22/2017   11:24:23  (  79.27, -96.03)    0.14                24
 07/22/2017   12:14:07   ( -79.55,  73.53) 07/22/2017   12:15:00  ( -79.56,  73.62)    1.95                53
 07/25/2017   02:52:43   ( -76.89,-159.16) 07/25/2017   02:51:29  ( -77.04,-159.92)   25.47                74
 07/25/2017   03:41:10   (  79.41,  20.82) 07/25/2017   03:41:12  (  79.42,  20.89)    1.54                 2
 07/27/2017   19:08:18   ( -79.19, -32.42) 07/27/2017   19:07:29  ( -79.19, -32.40)    0.48                49
 07/27/2017   19:57:38   (  79.40, 136.61) 07/27/2017   19:58:07  (  79.39, 136.48)    2.75                29
 07/30/2017   11:24:45   ( -79.21,  83.60) 07/30/2017   11:24:23  ( -79.20,  83.46)    3.04                22