Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 3 6.  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)
 03/08/2018   19:58:32   (  79.68, 138.75) 03/08/2018   19:57:58  (  79.68, 138.71)    0.92                34
 03/08/2018   20:47:54   ( -79.87, -52.13) 03/08/2018   20:48:37  ( -79.87, -52.16)    0.52                43
 03/11/2018   12:14:59   (  79.76,-104.77) 03/11/2018   12:14:52  (  79.75,-104.83)    1.31                 7
 03/11/2018   13:04:21   ( -79.95,  64.38) 03/11/2018   13:05:31  ( -79.95,  64.35)    0.59                70
 03/14/2018   03:42:06   ( -79.63,-157.50) 03/14/2018   03:41:08  ( -79.63,-157.49)    0.11                58
 03/14/2018   04:31:26   (  79.83,  11.69) 03/14/2018   04:31:46  (  79.83,  11.63)    1.28                20
 03/16/2018   19:58:31   ( -79.74, -40.81) 03/16/2018   19:58:00  ( -79.74, -40.76)    0.85                31
 03/16/2018   20:47:52   (  79.90, 128.12) 03/16/2018   20:48:39  (  79.90, 128.08)    0.82                47
 03/19/2018   12:14:58   ( -79.80,  75.59) 03/19/2018   12:14:54  ( -79.81,  75.69)    1.96                 4