Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 26.  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)
 12/29/2017   11:25:16   (  79.62, -93.51) 12/29/2017   11:24:49  (  79.62, -93.52)    0.27                27
 12/29/2017   12:14:38   ( -79.80,  75.49) 12/29/2017   12:15:29  ( -79.80,  75.36)    2.54                51
 01/01/2018   03:41:45   (  79.69,  22.85) 01/01/2018   03:41:41  (  79.68,  22.75)    2.11                 4
 01/01/2018   04:31:05   ( -79.94,-167.55) 01/01/2018   04:32:18  ( -79.94,-167.47)    1.61                73
 01/03/2018   19:08:53   ( -79.56, -29.82) 01/03/2018   19:07:54  ( -79.57, -29.77)    1.15                59
 01/03/2018   19:58:12   (  79.82, 139.73) 01/03/2018   19:58:30  (  79.83, 139.87)    2.86                18
 01/06/2018   11:25:21   ( -79.62,  86.47) 01/06/2018   11:24:45  ( -79.62,  86.47)    0.15                36
 01/06/2018   12:14:40   (  79.87,-103.97) 01/06/2018   12:15:21  (  79.88,-103.87)    2.09                41
 01/09/2018   03:41:49   ( -79.71,-157.01) 01/09/2018   03:41:36  ( -79.70,-157.02)    0.38                13