Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 5 9.  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)
 05/11/2016   02:52:10   (  79.33,  32.57) 05/11/2016   02:51:55  (  79.34,  32.69)    2.61                15
 05/11/2016   03:41:33   ( -79.49,-158.72) 05/11/2016   03:42:36  ( -79.48,-158.85)    2.85                63
 05/13/2016   18:19:17   ( -79.12, -20.56) 05/13/2016   18:18:11  ( -79.13, -20.45)    2.31                66
 05/13/2016   19:08:36   (  79.39, 148.79) 05/13/2016   19:08:48  (  79.39, 148.82)    0.61                12
 05/16/2016   10:35:43   ( -79.21,  95.85) 05/16/2016   10:35:04  ( -79.21,  95.91)    1.33                39
 05/16/2016   11:25:02   (  79.47, -94.78) 05/16/2016   11:25:41  (  79.47, -94.79)    0.32                39
 05/19/2016   02:52:08   ( -79.32,-147.54) 05/19/2016   02:51:56  ( -79.32,-147.46)    1.62                12
 05/19/2016   03:41:28   (  79.54,  21.59) 05/19/2016   03:42:34  (  79.54,  21.60)    0.28                66
 05/21/2016   18:19:13   (  79.13, 159.54) 05/21/2016   18:18:11  (  79.14, 159.66)    2.68                62