Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 12 22.  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)
 12/24/2017   02:52:18   (  79.49,  33.79) 12/24/2017   02:51:06  (  79.49,  33.79)    0.09                72
 12/24/2017   03:41:40   ( -79.67,-157.24) 12/24/2017   03:41:46  ( -79.67,-157.36)    2.50                 6
 12/26/2017   19:08:46   (  79.61, 150.50) 12/26/2017   19:07:56  (  79.61, 150.63)    2.85                50
 12/26/2017   19:58:08   ( -79.79, -40.49) 12/26/2017   19:58:36  ( -79.79, -40.48)    0.33                28
 12/29/2017   11:25:16   (  79.64, -93.37) 12/29/2017   11:24:49  (  79.64, -93.37)    0.05                27
 12/29/2017   12:14:37   ( -79.83,  75.66) 12/29/2017   12:15:28  ( -79.82,  75.54)    2.68                51
 01/01/2018   03:41:45   (  79.67,  22.73) 01/01/2018   03:41:41  (  79.67,  22.62)    2.27                 4
 01/01/2018   04:31:05   ( -79.93,-167.65) 01/01/2018   04:32:18  ( -79.93,-167.59)    1.37                73
 01/03/2018   19:08:53   ( -79.55, -29.91) 01/03/2018   19:07:54  ( -79.55, -29.87)    0.80                59