Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 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)
 09/21/2017   18:20:02   ( -76.17, -33.36) 09/21/2017   18:18:48  ( -76.35, -34.29)   31.63                74
 09/21/2017   19:08:18   (  79.27, 148.16) 09/21/2017   19:08:20  (  79.27, 148.13)    0.59                 2
 09/24/2017   10:35:26   ( -79.11,  95.36) 09/24/2017   10:34:36  ( -79.11,  95.36)    0.18                50
 09/24/2017   11:24:46   (  79.34, -95.51) 09/24/2017   11:25:14  (  79.34, -95.63)    2.64                28
 09/27/2017   02:51:55   ( -79.18,-148.33) 09/27/2017   02:51:31  ( -79.17,-148.41)    1.88                24
 09/27/2017   03:41:12   (  79.52,  21.58) 09/27/2017   03:42:05  (  79.53,  21.69)    2.14                53
 09/29/2017   18:20:25   (  75.22, 143.83) 09/29/2017   18:19:12  (  75.41, 142.56)   41.46                73
 09/29/2017   19:08:21   ( -79.36, -31.29) 09/29/2017   19:08:22  ( -79.37, -31.15)    2.96                 1
 10/02/2017   10:35:30   (  79.13, -84.51) 10/02/2017   10:34:40  (  79.13, -84.46)    1.23                50