Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 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)
 07/19/2017   19:08:22   (  79.15, 147.38) 07/19/2017   19:07:32  (  79.15, 147.33)    1.06                50
 07/19/2017   19:57:41   ( -79.48, -42.86) 07/19/2017   19:58:08  ( -79.48, -42.82)    0.80                27
 07/22/2017   11:24:47   (  79.27, -96.01) 07/22/2017   11:24:23  (  79.27, -96.01)    0.20                24
 07/22/2017   12:14:07   ( -79.55,  73.55) 07/22/2017   12:15:00  ( -79.56,  73.63)    1.85                53
 07/25/2017   02:52:44   ( -76.85,-159.31) 07/25/2017   02:51:30  ( -77.00,-160.09)   25.94                74
 07/25/2017   03:41:11   (  79.38,  20.60) 07/25/2017   03:41:13  (  79.39,  20.65)    1.27                 2
 07/27/2017   19:08:18   ( -79.19, -32.37) 07/27/2017   19:07:29  ( -79.19, -32.36)    0.25                49
 07/27/2017   19:57:38   (  79.41, 136.67) 07/27/2017   19:58:07  (  79.40, 136.53)    3.12                29
 07/30/2017   11:24:42   ( -79.34,  84.43) 07/30/2017   11:24:19  ( -79.34,  84.56)    2.83                23
 07/30/2017   12:14:03   (  79.51,-106.77) 07/30/2017   12:14:58  (  79.51,-106.80)    0.59                55
 08/02/2017   02:51:50   (  79.02,  30.68) 08/02/2017   02:50:37  (  79.01,  30.56)    2.86                73