Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 4 23.  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)
 04/25/2016   02:52:20   (  79.31,  32.37) 04/25/2016   02:51:53  (  79.32,  32.51)    3.00                27
 04/25/2016   03:41:43   ( -79.47,-158.92) 04/25/2016   03:42:34  ( -79.47,-158.99)    1.55                51
 04/27/2016   18:20:28   ( -76.36, -32.85) 04/27/2016   18:19:14  ( -76.53, -33.73)   29.71                74
 04/27/2016   19:08:46   (  79.34, 148.44) 04/27/2016   19:08:48  (  79.34, 148.48)    0.94                 2
 04/30/2016   10:35:51   ( -79.17,  95.64) 04/30/2016   10:35:04  ( -79.18,  95.72)    2.00                47
 04/30/2016   11:25:10   (  79.43, -95.03) 04/30/2016   11:25:41  (  79.43, -95.03)    0.09                31
 05/03/2016   02:52:14   ( -79.30,-147.65) 05/03/2016   02:51:56  ( -79.31,-147.55)    2.09                18
 05/03/2016   03:41:34   (  79.52,  21.45) 05/03/2016   03:42:34  (  79.52,  21.47)    0.55                60
 05/05/2016   18:19:16   (  79.13, 159.53) 05/05/2016   18:18:10  (  79.14, 159.65)    2.57                66