Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 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)
 12/19/2015   02:02:40   ( -79.24,-135.55) 12/19/2015   02:02:33  ( -79.24,-135.55)    0.18                 7
 12/19/2015   02:51:57   (  79.59,  34.42) 12/19/2015   02:53:07  (  79.59,  34.53)    2.45                70
 12/21/2015   17:29:47   (  79.04, 171.41) 12/21/2015   17:28:46  (  79.03, 171.39)    0.46                61
 12/21/2015   18:19:05   ( -79.40, -18.66) 12/21/2015   18:19:21  ( -79.40, -18.59)    1.42                16
 12/24/2015   09:46:15   (  79.10, -72.35) 12/24/2015   09:45:38  (  79.09, -72.47)    2.75                37
 12/24/2015   10:35:34   ( -79.42,  97.36) 12/24/2015   10:36:14  ( -79.42,  97.30)    1.15                40
 12/27/2015   02:02:42   (  79.18,  44.03) 12/27/2015   02:02:29  (  79.17,  43.90)    2.76                13
 12/27/2015   02:52:00   ( -79.53,-145.96) 12/27/2015   02:53:04  ( -79.53,-146.02)    1.40                64
 12/29/2015   17:29:47   ( -79.09,  -8.24) 12/29/2015   17:28:40  ( -79.10,  -8.15)    2.15                67