Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 7 20.  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, 147.15)    1.52                73
 07/22/2018   19:58:15   ( -79.46, -43.05) 07/22/2018   19:58:19  ( -79.46, -43.03)    0.33                 4
 07/25/2018   11:25:20   (  79.31, -95.81) 07/25/2018   11:24:35  (  79.31, -95.72)    2.07                45
 07/25/2018   12:14:42   ( -79.51,  73.19) 07/25/2018   12:15:15  ( -79.50,  73.10)    2.12                33
 07/28/2018   03:41:47   (  79.36,  20.40) 07/28/2018   03:41:31  (  79.36,  20.38)    0.31                16
 07/28/2018   04:31:07   ( -79.63,-170.05) 07/28/2018   04:32:08  ( -79.64,-169.94)    2.35                61
 07/30/2018   19:08:52   ( -79.22, -32.24) 07/30/2018   19:07:47  ( -79.22, -32.18)    1.29                65
 07/30/2018   19:58:12   (  79.44, 136.85) 07/30/2018   19:58:25  (  79.43, 136.75)    2.10                13
 08/02/2018   11:25:18   ( -79.30,  84.18) 08/02/2018   11:24:42  ( -79.30,  84.19)    0.22                36