Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2015 12 12.  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)
 12/13/2015   17:29:46   ( -78.98,  -8.93) 12/13/2015   17:28:54  ( -78.97,  -9.04)    2.41                52
 12/13/2015   18:19:02   (  79.37, 161.17) 12/13/2015   18:19:27  (  79.37, 161.14)    0.79                25
 12/16/2015   09:46:11   ( -79.18, 108.14) 12/16/2015   09:45:41  ( -79.18, 108.16)    0.37                30
 12/16/2015   10:35:28   (  79.52, -81.95) 12/16/2015   10:36:15  (  79.52, -81.83)    2.45                47
 12/19/2015   02:02:40   ( -79.23,-135.61) 12/19/2015   02:02:33  ( -79.23,-135.66)    0.94                 7
 12/19/2015   02:51:57   (  79.57,  34.31) 12/19/2015   02:53:07  (  79.58,  34.38)    1.58                70
 12/21/2015   17:29:49   (  78.99, 171.09) 12/21/2015   17:28:48  (  78.98, 171.02)    1.71                61
 12/21/2015   18:19:07   ( -79.35, -18.96) 12/21/2015   18:19:23  ( -79.35, -18.96)    0.13                16
 12/24/2015   09:46:13   (  79.21, -71.67) 12/24/2015   09:45:35  (  79.21, -71.58)    1.81                38