Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 1 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)
 01/19/2018   19:10:28   ( -75.67, -47.23) 01/19/2018   19:09:14  ( -75.92, -48.57)   46.45                74
 01/19/2018   19:58:19   (  79.81, 139.73) 01/19/2018   19:58:20  (  79.82, 139.86)    2.69                 1
 01/22/2018   11:25:28   ( -79.63,  86.58) 01/22/2018   11:24:35  ( -79.63,  86.61)    0.53                53
 01/22/2018   12:14:50   (  79.78,-104.69) 01/22/2018   12:15:15  (  79.77,-104.80)    2.32                25
 01/25/2018   03:41:56   ( -79.70,-157.02) 01/25/2018   03:41:26  ( -79.71,-156.93)    1.97                30
 01/25/2018   04:31:17   (  79.88,  11.99) 01/25/2018   04:32:05  (  79.88,  11.97)    0.41                48
 01/27/2018   19:58:24   ( -79.73, -40.91) 01/27/2018   19:58:18  ( -79.72, -41.02)    2.43                 6
 01/27/2018   20:47:43   (  79.97, 128.65) 01/27/2018   20:48:54  (  79.98, 128.75)    2.01                71
 01/30/2018   11:25:30   (  79.60, -93.65) 01/30/2018   11:24:30  (  79.59, -93.67)    0.57                60