Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 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)
 12/24/2015   09:46:14   (  79.14, -72.09) 12/24/2015   09:45:37  (  79.14, -72.09)    0.25                37
 12/24/2015   10:35:32   ( -79.49,  97.87) 12/24/2015   10:36:12  ( -79.50,  97.96)    1.84                40
 12/27/2015   02:02:37   (  79.31,  44.92) 12/27/2015   02:02:24  (  79.32,  45.05)    2.75                13
 12/27/2015   02:51:59   ( -79.51,-146.10) 12/27/2015   02:53:04  ( -79.51,-146.19)    2.13                65
 12/29/2015   17:29:47   ( -79.01,  -8.76) 12/29/2015   17:28:42  ( -79.00,  -8.83)    1.61                65
 12/29/2015   18:19:02   (  79.43, 161.56) 12/29/2015   18:19:14  (  79.43, 161.66)    2.14                12
 01/01/2016   09:46:10   ( -79.18, 108.20) 01/01/2016   09:45:30  ( -79.18, 108.22)    0.44                40
 01/01/2016   10:35:29   (  79.44, -82.46) 01/01/2016   10:36:07  (  79.44, -82.54)    1.76                38
 01/04/2016   02:02:35   ( -79.25,-135.46) 01/04/2016   02:02:21  ( -79.25,-135.49)    0.74                14