Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 6 19.  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)
 06/20/2018   19:11:12   (  72.90, 126.13) 06/20/2018   19:09:59  (  73.21, 124.23)   70.63                73
 06/20/2018   19:58:20   ( -79.49, -42.84) 06/20/2018   19:58:20  ( -79.49, -42.77)    1.61                 0
 06/23/2018   11:25:27   (  79.25, -96.15) 06/23/2018   11:24:37  (  79.24, -96.29)    3.06                50
 06/23/2018   12:14:46   ( -79.58,  73.67) 06/23/2018   12:15:12  ( -79.59,  73.78)    2.33                26
 06/26/2018   03:41:52   (  79.34,  20.30) 06/26/2018   03:41:28  (  79.34,  20.20)    2.02                24
 06/26/2018   04:31:13   ( -79.59,-170.36) 06/26/2018   04:32:06  ( -79.58,-170.50)    3.05                53
 06/28/2018   19:10:27   ( -75.16, -48.71) 06/28/2018   19:09:13  ( -75.41, -50.04)   46.95                74
 06/28/2018   19:58:17   (  79.46, 136.99) 06/28/2018   19:58:19  (  79.46, 136.96)    0.71                 2
 07/01/2018   11:25:24   ( -79.30,  84.12) 07/01/2018   11:24:34  ( -79.30,  84.15)    0.71                50