Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 2 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)
 02/20/2018   19:58:28   (  79.70, 138.92) 02/20/2018   19:58:00  (  79.70, 138.85)    1.44                28
 02/20/2018   20:47:49   ( -79.92, -51.69) 02/20/2018   20:48:38  ( -79.92, -51.77)    1.69                49
 02/23/2018   12:14:54   (  79.84,-104.09) 02/23/2018   12:14:48  (  79.85,-103.95)    3.04                 6
 02/23/2018   13:04:16   ( -80.03,  65.07) 02/23/2018   13:05:27  ( -80.03,  65.21)    2.81                71
 02/26/2018   03:42:02   ( -79.70,-156.91) 02/26/2018   03:41:01  ( -79.71,-156.79)    2.43                61
 02/26/2018   04:31:23   (  79.87,  12.03) 02/26/2018   04:31:40  (  79.88,  12.10)    1.55                17
 02/28/2018   19:58:31   ( -79.73, -40.81) 02/28/2018   19:57:53  ( -79.74, -40.74)    1.41                38
 02/28/2018   20:47:51   (  79.93, 128.41) 02/28/2018   20:48:31  (  79.93, 128.43)    0.46                40
 03/03/2018   12:14:58   ( -79.79,  75.54) 03/03/2018   12:14:43  ( -79.80,  75.58)    0.88                15