Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 4 17.  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)
 04/17/2016   03:41:47   (  79.56,  21.79) 04/17/2016   03:42:29  (  79.57,  21.91)    2.73                42
 04/19/2016   19:08:53   ( -79.33, -31.53) 04/19/2016   19:08:47  ( -79.33, -31.64)    2.47                 6
 04/19/2016   19:58:11   (  79.63, 138.16) 04/19/2016   19:59:22  (  79.63, 138.20)    0.83                71
 04/22/2016   10:35:56   (  79.19, -84.19) 04/22/2016   10:35:01  (  79.19, -84.17)    0.58                55
 04/22/2016   11:25:15   ( -79.51,  85.55) 04/22/2016   11:25:37  ( -79.52,  85.68)    2.90                22
 04/25/2016   02:52:19   (  79.32,  32.52) 04/25/2016   02:51:53  (  79.32,  32.57)    0.98                26
 04/25/2016   03:41:38   ( -79.64,-157.68) 04/25/2016   03:42:29  ( -79.64,-157.52)    3.15                51
 04/27/2016   18:19:34   ( -78.74, -22.74) 04/27/2016   18:18:20  ( -78.77, -22.87)    4.59                74
 04/27/2016   19:08:41   (  79.48, 149.45) 04/27/2016   19:08:44  (  79.48, 149.58)    2.64                 3
 04/30/2016   10:35:46   ( -79.25,  96.20) 04/30/2016   10:35:01  ( -79.26,  96.26)    1.26                45