Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 3 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)
 03/22/2018   03:42:06   (  79.56,  21.84) 03/22/2018   03:41:12  (  79.56,  21.94)    2.18                54
 03/22/2018   04:31:29   ( -79.72,-169.36) 03/22/2018   04:31:53  ( -79.71,-169.48)    2.47                24
 03/24/2018   19:58:34   (  79.58, 137.86) 03/24/2018   19:58:08  (  79.57, 137.77)    1.88                26
 03/24/2018   20:47:55   ( -79.81, -52.78) 03/24/2018   20:48:46  ( -79.81, -52.77)    0.40                51
 03/27/2018   11:27:20   ( -74.92,  66.59) 03/27/2018   11:26:06  ( -75.21,  65.05)   54.75                74
 03/27/2018   12:14:59   (  79.70,-105.35) 03/27/2018   12:15:00  (  79.70,-105.30)    1.16                 1
 03/30/2018   03:42:05   ( -79.57,-158.04) 03/30/2018   03:41:16  ( -79.58,-157.96)    1.74                49
 03/30/2018   04:31:26   (  79.74,  10.87) 03/30/2018   04:31:55  (  79.74,  10.79)    1.57                29
 04/01/2018   19:58:31   ( -79.61, -41.87) 04/01/2018   19:58:10  ( -79.61, -41.87)    0.18                21