Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 5 6.  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)
 05/09/2018   03:42:00   (  79.48,  21.17) 05/09/2018   03:41:26  (  79.48,  21.29)    2.41                34
 05/09/2018   04:31:22   ( -79.66,-169.88) 05/09/2018   04:32:06  ( -79.66,-169.87)    0.29                44
 05/11/2018   19:58:28   (  79.50, 137.21) 05/11/2018   19:58:21  (  79.50, 137.18)    0.81                 7
 05/11/2018   20:47:48   ( -79.76, -53.27) 05/11/2018   20:48:58  ( -79.77, -53.12)    3.12                70
 05/14/2018   11:25:34   ( -79.37,  84.55) 05/14/2018   11:24:36  ( -79.37,  84.59)    0.83                58
 05/14/2018   12:14:53   (  79.63,-105.99) 05/14/2018   12:15:12  (  79.64,-105.84)    3.10                19
 05/17/2018   03:42:01   ( -79.42,-159.22) 05/17/2018   03:41:30  ( -79.41,-159.28)    1.47                31
 05/17/2018   04:31:20   (  79.68,  10.24) 05/17/2018   04:32:06  (  79.68,  10.30)    1.30                46
 05/19/2018   19:58:27   ( -79.46, -43.02) 05/19/2018   19:58:23  ( -79.45, -43.16)    3.03                 4