Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 12 21.  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)
 12/23/2016   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   (  79.61, 150.49) 12/23/2016   19:08:14  (  79.61, 150.51)    0.26                 2
 12/26/2016   10:35:21   ( -79.39,  97.22) 12/26/2016   10:34:30  ( -79.38,  97.10)    2.78                51
 12/26/2016   11:24:39   (  79.69, -93.05) 12/26/2016   11:25:05  (  79.68, -93.05)    0.19                26
 12/29/2016   02:51:49   ( -79.47,-146.38) 12/29/2016   02:51:22  ( -79.46,-146.50)    2.72                27
 12/29/2016   03:41:07   (  79.76,  23.38) 12/29/2016   03:41:57  (  79.76,  23.38)    0.18                50
 12/31/2016   19:08:16   ( -79.57, -29.75) 12/31/2016   19:08:13  ( -79.57, -29.84)    1.89                 3
 12/31/2016   19:57:14   (  80.52, 146.06) 12/31/2016   19:58:28  (  80.41, 146.26)   12.39                74
 01/03/2017   10:35:23   (  79.40, -82.72) 01/03/2017   10:34:27  (  79.39, -82.82)    2.24                56