Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 12 14.  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)
 12/16/2015   09:46:11   ( -79.17, 108.12) 12/16/2015   09:45:41  ( -79.17, 108.14)    0.42                30
 12/16/2015   10:35:28   (  79.52, -81.95) 12/16/2015   10:36:15  (  79.52, -81.84)    2.43                47
 12/19/2015   02:02:40   ( -79.23,-135.64) 12/19/2015   02:02:33  ( -79.23,-135.68)    0.85                 7
 12/19/2015   02:51:57   (  79.57,  34.30) 12/19/2015   02:53:07  (  79.58,  34.38)    1.59                70
 12/21/2015   17:29:49   (  78.98, 171.08) 12/21/2015   17:28:48  (  78.98, 171.00)    1.69                61
 12/21/2015   18:19:07   ( -79.35, -18.99) 12/21/2015   18:19:23  ( -79.35, -18.99)    0.27                16
 12/24/2015   09:46:13   (  79.20, -71.69) 12/24/2015   09:45:35  (  79.21, -71.60)    1.84                38
 12/24/2015   10:35:35   ( -79.41,  97.29) 12/24/2015   10:36:15  ( -79.40,  97.16)    2.83                40
 12/27/2015   02:02:39   (  79.29,  44.72) 12/27/2015   02:02:25  (  79.29,  44.78)    1.33                14