Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 10 21.  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)
 10/23/2017   19:08:16   (  79.62, 150.54) 10/23/2017   19:08:15  (  79.62, 150.54)    0.27                 1
 10/23/2017   19:56:16   ( -81.75, -11.25) 10/23/2017   19:57:30  ( -81.32, -11.02)   47.19                74
 10/26/2017   10:35:23   ( -79.47,  97.71) 10/26/2017   10:34:30  ( -79.47,  97.78)    1.49                53
 10/26/2017   11:24:42   (  79.71, -92.88) 10/26/2017   11:25:07  (  79.71, -92.84)    0.77                25
 10/29/2017   02:51:48   ( -79.56,-145.75) 10/29/2017   02:51:21  ( -79.57,-145.63)    2.64                27
 10/29/2017   03:41:07   (  79.80,  23.67) 10/29/2017   03:41:58  (  79.81,  23.77)    1.96                51
 10/31/2017   18:21:53   (  70.60, 134.59) 10/31/2017   18:20:41  (  70.93, 132.30)   91.60                72
 10/31/2017   19:08:16   ( -79.57, -29.77) 10/31/2017   19:08:16  ( -79.57, -29.87)    1.97                 0
 11/03/2017   10:35:20   (  79.44, -82.43) 11/03/2017   10:34:29  (  79.45, -82.42)    0.37                51