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   19:08:46   (  79.61, 150.54) 12/26/2017   19:07:56  (  79.62, 150.67)    2.80                50
 12/26/2017   19:58:08   ( -79.79, -40.47) 12/26/2017   19:58:36  ( -79.79, -40.45)    0.34                28
 12/29/2017   11:25:15   (  79.65, -93.32) 12/29/2017   11:24:48  (  79.65, -93.33)    0.26                27
 12/29/2017   12:14:37   ( -79.83,  75.69) 12/29/2017   12:15:28  ( -79.82,  75.56)    2.78                51
 01/01/2018   03:41:45   (  79.68,  22.78) 01/01/2018   03:41:41  (  79.67,  22.66)    2.63                 4
 01/01/2018   04:31:05   ( -79.93,-167.62) 01/01/2018   04:32:18  ( -79.93,-167.57)    1.06                73
 01/03/2018   19:08:53   ( -79.55, -29.88) 01/03/2018   19:07:54  ( -79.55, -29.87)    0.19                59
 01/03/2018   19:58:12   (  79.81, 139.67) 01/03/2018   19:58:30  (  79.82, 139.76)    1.92                18
 01/06/2018   11:25:22   ( -79.61,  86.42) 01/06/2018   11:24:46  ( -79.61,  86.36)    1.41                36