Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 13.  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)
 09/16/2017   10:35:21   (  79.09, -84.76) 09/16/2017   10:34:32  (  79.09, -84.79)    0.62                49
 09/16/2017   11:24:39   ( -79.44,  85.15) 09/16/2017   11:25:07  ( -79.44,  85.24)    1.93                28
 09/19/2017   02:51:46   (  79.28,  32.35) 09/19/2017   02:51:22  (  79.29,  32.49)    3.18                24
 09/19/2017   03:41:08   ( -79.48,-158.71) 09/19/2017   03:42:02  ( -79.47,-158.75)    1.00                54
 09/21/2017   18:19:51   ( -76.66, -31.74) 09/21/2017   18:18:37  ( -76.82, -32.53)   26.54                74
 09/21/2017   19:08:16   (  79.31, 148.42) 09/21/2017   19:08:18  (  79.32, 148.48)    1.28                 2
 09/24/2017   10:35:25   ( -79.15,  95.60) 09/24/2017   10:34:35  ( -79.16,  95.72)    2.66                50
 09/24/2017   11:24:45   (  79.38, -95.29) 09/24/2017   11:25:13  (  79.38, -95.29)    0.21                28
 09/27/2017   02:51:53   ( -79.25,-147.89) 09/27/2017   02:51:29  ( -79.25,-147.81)    1.76                24