Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 12 18.  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)
 12/21/2016   02:51:43   (  79.55,  34.25) 12/21/2016   02:51:21  (  79.56,  34.32)    1.48                22
 12/21/2016   03:41:05   ( -79.74,-156.72) 12/21/2016   03:42:01  ( -79.74,-156.81)    1.92                56
 12/23/2016   18:19:46   ( -77.07, -30.21) 12/23/2016   18:18:32  ( -77.23, -31.03)   27.03                74
 12/23/2016   19:08:12   (  79.60, 150.48) 12/23/2016   19:08:14  (  79.61, 150.49)    0.22                 2
 12/26/2016   10:35:21   ( -79.39,  97.23) 12/26/2016   10:34:30  ( -79.38,  97.10)    3.01                51
 12/26/2016   11:24:39   (  79.69, -93.05) 12/26/2016   11:25:05  (  79.68, -93.06)    0.43                26
 12/29/2016   02:51:46   ( -79.58,-145.56) 12/29/2016   02:51:18  ( -79.59,-145.41)    3.14                28
 12/29/2016   03:41:07   (  79.76,  23.39) 12/29/2016   03:41:57  (  79.76,  23.38)    0.39                50
 12/31/2016   19:08:17   ( -79.54, -29.97) 12/31/2016   19:08:14  ( -79.54, -30.10)    2.78                 3