Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 9 21.  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)
 09/21/2016   10:35:14   ( -79.07,  95.09) 09/21/2016   10:34:30  ( -79.06,  95.01)    1.89                44
 09/21/2016   11:24:30   (  79.46, -94.77) 09/21/2016   11:25:03  (  79.47, -94.63)    3.04                33
 09/24/2016   02:51:36   ( -79.27,-147.80) 09/24/2016   02:51:21  ( -79.27,-147.71)    2.11                15
 09/24/2016   03:40:55   (  79.53,  21.62) 09/24/2016   03:41:58  (  79.53,  21.66)    0.93                63
 09/26/2016   18:18:42   (  79.05, 159.09) 09/26/2016   18:17:40  (  79.05, 159.11)    0.38                62
 09/26/2016   19:08:01   ( -79.37, -31.23) 09/26/2016   19:08:16  ( -79.37, -31.18)    1.05                15
 09/29/2016   10:35:06   (  79.18, -84.18) 09/29/2016   10:34:34  (  79.18, -84.16)    0.54                32
 09/29/2016   11:24:26   ( -79.47,  85.30) 09/29/2016   11:25:11  ( -79.47,  85.35)    1.17                45
 10/02/2016   02:51:30   (  79.31,  32.50) 10/02/2016   02:51:28  (  79.31,  32.58)    1.80                 2
 10/02/2016   03:39:56   ( -81.22,-140.78) 10/02/2016   03:41:10  ( -80.96,-140.21)   30.94                74
 10/04/2016   18:18:37   ( -79.04, -20.91) 10/04/2016   18:17:48  ( -79.04, -20.96)    0.92                49