Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 25.  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)
 12/26/2017   19:08:45   (  79.62, 150.59) 12/26/2017   19:07:55  (  79.63, 150.72)    2.76                50
 12/26/2017   19:58:07   ( -79.80, -40.41) 12/26/2017   19:58:35  ( -79.80, -40.40)    0.23                28
 12/29/2017   11:25:16   (  79.62, -93.54) 12/29/2017   11:24:49  (  79.62, -93.56)    0.42                27
 12/29/2017   12:14:38   ( -79.80,  75.47) 12/29/2017   12:15:29  ( -79.79,  75.32)    3.04                51
 01/01/2018   03:41:46   (  79.65,  22.56) 01/01/2018   03:41:42  (  79.64,  22.41)    3.01                 4
 01/01/2018   04:31:05   ( -79.94,-167.56) 01/01/2018   04:32:18  ( -79.94,-167.53)    0.66                73
 01/03/2018   19:08:54   ( -79.53, -30.08) 01/03/2018   19:07:55  ( -79.53, -30.11)    0.54                59
 01/03/2018   19:58:13   (  79.78, 139.45) 01/03/2018   19:58:31  (  79.79, 139.50)    1.29                18
 01/06/2018   11:25:22   ( -79.58,  86.22) 01/06/2018   11:24:46  ( -79.58,  86.10)    2.42                36