Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 22.  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)
 04/23/2018   03:42:07   (  79.45,  20.99) 04/23/2018   03:41:25  (  79.45,  21.00)    0.37                42
 04/23/2018   04:31:29   ( -79.63,-170.08) 04/23/2018   04:32:05  ( -79.63,-170.13)    1.05                36
 04/25/2018   19:58:34   (  79.48, 137.08) 04/25/2018   19:58:20  (  79.47, 136.96)    2.59                14
 04/25/2018   20:47:53   ( -79.78, -53.15) 04/25/2018   20:48:56  ( -79.78, -53.03)    2.52                63
 04/28/2018   11:25:39   ( -79.35,  84.45) 04/28/2018   11:24:35  ( -79.35,  84.48)    0.55                64
 04/28/2018   12:14:58   (  79.62,-106.07) 04/28/2018   12:15:11  (  79.62,-106.00)    1.51                13
 05/01/2018   03:42:04   ( -79.41,-159.26) 05/01/2018   03:41:28  ( -79.41,-159.32)    1.45                36
 05/01/2018   04:31:23   (  79.68,  10.23) 05/01/2018   04:32:04  (  79.67,  10.22)    0.35                41
 05/03/2018   19:58:30   ( -79.47, -43.00) 05/03/2018   19:58:22  ( -79.46, -43.14)    2.95                 8
 05/03/2018   20:47:49   (  79.73, 126.49) 05/03/2018   20:48:58  (  79.72, 126.42)    1.56                69
 05/06/2018   11:25:34   (  79.32, -95.75) 05/06/2018   11:24:36  (  79.31, -95.83)    1.93                58