Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 10.  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)
 04/12/2018   11:25:43   ( -79.37,  84.60) 04/12/2018   11:24:31  ( -79.36,  84.51)    2.04                72
 04/12/2018   12:15:02   (  79.63,-105.91) 04/12/2018   12:15:07  (  79.63,-105.95)    1.00                 5
 04/15/2018   03:42:08   ( -79.52,-158.48) 04/15/2018   03:41:22  ( -79.52,-158.39)    1.90                46
 04/15/2018   04:31:28   (  79.74,  10.77) 04/15/2018   04:31:59  (  79.75,  10.91)    2.91                31
 04/17/2018   19:58:36   ( -79.55, -42.37) 04/17/2018   19:58:17  ( -79.55, -42.38)    0.17                19
 04/17/2018   20:47:56   (  79.77, 126.89) 04/17/2018   20:48:54  (  79.78, 126.93)    0.87                58
 04/20/2018   11:25:41   (  79.39, -95.26) 04/20/2018   11:24:31  (  79.39, -95.28)    0.28                70
 04/20/2018   12:15:02   ( -79.62,  73.98) 04/20/2018   12:15:10  ( -79.61,  73.90)    1.68                 8
 04/23/2018   03:42:08   (  79.45,  21.04) 04/23/2018   03:41:25  (  79.45,  20.97)    1.51                43