Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 6 23.  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)
 06/26/2018   03:41:51   (  79.38,  20.59) 06/26/2018   03:41:27  (  79.38,  20.53)    1.30                24
 06/26/2018   04:31:13   ( -79.59,-170.35) 06/26/2018   04:32:06  ( -79.58,-170.46)    2.18                53
 06/28/2018   19:10:15   ( -75.75, -47.04) 06/28/2018   19:09:01  ( -75.98, -48.22)   40.67                74
 06/28/2018   19:58:16   (  79.50, 137.26) 06/28/2018   19:58:18  (  79.50, 137.30)    0.79                 2
 07/01/2018   11:25:22   ( -79.37,  84.58) 07/01/2018   11:24:32  ( -79.37,  84.73)    3.18                50
 07/01/2018   12:14:44   (  79.50,-106.88) 07/01/2018   12:15:13  (  79.49,-107.03)    3.16                29
 07/04/2018   03:41:48   ( -79.40,-159.32) 07/04/2018   03:41:25  ( -79.40,-159.32)    0.31                23
 07/04/2018   04:31:07   (  79.64,  10.02) 07/04/2018   04:32:02  (  79.64,  10.01)    0.32                55
 07/06/2018   19:08:54   (  79.17, 147.43) 07/06/2018   19:07:41  (  79.16, 147.33)    2.41                73