Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 7 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)
 07/22/2018   19:08:56   (  79.13, 147.22) 07/22/2018   19:07:43  (  79.13, 147.14)    1.71                73
 07/22/2018   19:58:15   ( -79.45, -43.06) 07/22/2018   19:58:19  ( -79.45, -43.05)    0.16                 4
 07/25/2018   11:25:20   (  79.31, -95.81) 07/25/2018   11:24:35  (  79.31, -95.74)    1.38                45
 07/25/2018   12:14:43   ( -79.47,  72.93) 07/25/2018   12:15:16  ( -79.46,  72.79)    2.84                33
 07/28/2018   03:41:47   (  79.36,  20.41) 07/28/2018   03:41:31  (  79.35,  20.33)    1.75                16
 07/28/2018   04:31:07   ( -79.63,-170.04) 07/28/2018   04:32:08  ( -79.63,-170.00)    0.83                61
 07/30/2018   19:08:53   ( -79.18, -32.47) 07/30/2018   19:07:48  ( -79.18, -32.53)    1.30                65
 07/30/2018   19:58:11   (  79.48, 137.13) 07/30/2018   19:58:23  (  79.49, 137.21)    1.75                12
 08/02/2018   11:25:17   ( -79.35,  84.46) 08/02/2018   11:24:40  ( -79.35,  84.58)    2.62                37