Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 4 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)
 04/11/2016   19:09:00   (  79.29, 148.15) 04/11/2016   19:08:46  (  79.28, 148.06)    2.01                14
 04/11/2016   19:58:19   ( -79.60, -42.08) 04/11/2016   19:59:22  ( -79.61, -42.04)    0.93                63
 04/14/2016   10:36:07   ( -79.08,  95.08) 04/14/2016   10:35:04  ( -79.07,  94.94)    3.11                63
 04/14/2016   11:25:24   (  79.42, -95.10) 04/14/2016   11:25:38  (  79.42, -95.11)    0.27                14
 04/17/2016   02:52:29   ( -79.24,-148.01) 04/17/2016   02:51:54  ( -79.25,-148.02)    0.27                35
 04/17/2016   03:41:46   (  79.58,  21.87) 04/17/2016   03:42:28  (  79.59,  22.02)    3.16                42
 04/19/2016   19:08:54   ( -79.32, -31.64) 04/19/2016   19:08:48  ( -79.31, -31.75)    2.26                 6
 04/19/2016   19:58:11   (  79.65, 138.26) 04/19/2016   19:59:22  (  79.65, 138.32)    1.38                71
 04/22/2016   10:35:56   (  79.21, -84.10) 04/22/2016   10:35:01  (  79.21, -84.04)    1.36                55