Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 10.  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)
 09/11/2017   02:51:45   ( -79.24,-147.92) 09/11/2017   02:51:19  ( -79.25,-147.85)    1.43                26
 09/11/2017   03:41:06   (  79.44,  21.02) 09/11/2017   03:41:58  (  79.43,  20.92)    2.14                52
 09/13/2017   18:19:19   (  77.84, 152.92) 09/13/2017   18:18:05  (  77.94, 152.57)   13.95                74
 09/13/2017   19:08:11   ( -79.31, -31.57) 09/13/2017   19:08:14  ( -79.31, -31.56)    0.26                 3
 09/16/2017   10:35:17   (  79.10, -84.69) 09/16/2017   10:34:32  (  79.09, -84.79)    2.26                45
 09/16/2017   11:24:36   ( -79.41,  84.98) 09/16/2017   11:25:08  ( -79.41,  84.98)    0.15                32
 09/19/2017   02:51:40   (  79.23,  32.01) 09/19/2017   02:51:24  (  79.22,  31.96)    1.04                16
 09/19/2017   03:40:59   ( -79.54,-158.26) 09/19/2017   03:42:00  ( -79.54,-158.20)    1.18                61
 09/21/2017   18:18:47   ( -79.00, -21.14) 09/21/2017   18:17:43  ( -78.99, -21.25)    2.66                64
 09/21/2017   19:08:03   (  79.38, 148.92) 09/21/2017   19:08:16  (  79.39, 148.99)    1.32                13
 09/24/2017   10:35:10   ( -79.15,  95.69) 09/24/2017   10:34:35  ( -79.16,  95.71)    0.42                35