Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 5 7.  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,  21.19) 05/09/2018   03:41:26  (  79.48,  21.29)    2.25                34
 05/09/2018   04:31:22   ( -79.66,-169.87) 05/09/2018   04:32:06  ( -79.66,-169.87)    0.16                44
 05/11/2018   19:58:28   (  79.50, 137.24) 05/11/2018   19:58:21  (  79.50, 137.19)    1.27                 7
 05/11/2018   20:47:48   ( -79.76, -53.24) 05/11/2018   20:48:58  ( -79.77, -53.12)    2.69                70
 05/14/2018   11:25:35   ( -79.33,  84.34) 05/14/2018   11:24:37  ( -79.33,  84.33)    0.12                58
 05/14/2018   12:14:53   (  79.64,-105.94) 05/14/2018   12:15:12  (  79.64,-105.83)    2.23                19
 05/17/2018   03:42:02   ( -79.39,-159.41) 05/17/2018   03:41:31  ( -79.38,-159.54)    2.90                31
 05/17/2018   04:31:21   (  79.65,  10.04) 05/17/2018   04:32:07  (  79.65,  10.03)    0.24                46
 05/19/2018   19:58:26   ( -79.52, -42.67) 05/19/2018   19:58:21  ( -79.52, -42.61)    1.19                 5