Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 9 20.  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)
 09/22/2018   02:52:09   (  79.10,  31.14) 09/22/2018   02:51:26  (  79.11,  31.17)    0.78                43
 09/22/2018   03:41:28   ( -79.42,-159.17) 09/22/2018   03:42:02  ( -79.43,-159.03)    3.17                34
 09/24/2018   19:08:35   (  79.22, 147.74) 09/24/2018   19:08:19  (  79.23, 147.82)    1.93                16
 09/24/2018   19:57:57   ( -79.42, -43.30) 09/24/2018   19:58:59  ( -79.41, -43.41)    2.47                62
 09/27/2018   10:35:44   ( -78.98,  94.53) 09/27/2018   10:34:38  ( -78.98,  94.51)    0.51                66
 09/27/2018   11:25:03   (  79.25, -96.19) 09/27/2018   11:25:15  (  79.24, -96.31)    2.94                12
 09/30/2018   02:52:10   ( -79.10,-148.92) 09/30/2018   02:51:31  ( -79.10,-148.88)    0.94                39
 09/30/2018   03:41:29   (  79.36,  20.38) 09/30/2018   03:42:08  (  79.35,  20.33)    1.02                39
 10/02/2018   19:08:34   ( -79.24, -32.13) 10/02/2018   19:08:22  ( -79.25, -32.00)    2.75                12