Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2019 4 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)
 04/23/2019   11:25:18   (  79.37, -95.43) 04/23/2019   11:24:22  (  79.37, -95.40)    0.65                56
 04/23/2019   12:14:40   ( -79.56,  73.53) 04/23/2019   12:15:02  ( -79.56,  73.42)    2.22                22
 04/26/2019   03:41:44   (  79.45,  20.98) 04/26/2019   03:41:17  (  79.45,  20.95)    0.60                27
 04/26/2019   04:31:04   ( -79.71,-169.49) 04/26/2019   04:31:54  ( -79.73,-169.35)    3.06                50
 04/28/2019   19:09:50   ( -76.68, -44.09) 04/28/2019   19:08:36  ( -76.87, -45.04)   31.82                74
 04/28/2019   19:58:10   (  79.52, 137.37) 04/28/2019   19:58:12  (  79.52, 137.33)    0.76                 2
 05/01/2019   11:25:16   ( -79.33,  84.33) 05/01/2019   11:24:30  ( -79.33,  84.22)    2.34                46
 05/01/2019   12:14:34   (  79.63,-105.99) 05/01/2019   12:15:05  (  79.63,-105.98)    0.16                31
 05/04/2019   03:41:40   ( -79.48,-158.81) 05/04/2019   03:41:23  ( -79.48,-158.83)    0.54                17