Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 5 15.  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)
 05/16/2017   19:08:38   (  79.20, 147.61) 05/16/2017   19:07:39  (  79.20, 147.56)    0.91                59
 05/16/2017   19:57:57   ( -79.51, -42.73) 05/16/2017   19:58:15  ( -79.51, -42.66)    1.45                18
 05/19/2017   11:25:05   (  79.28, -95.98) 05/19/2017   11:24:32  (  79.28, -96.06)    1.60                33
 05/19/2017   12:14:24   ( -79.59,  73.73) 05/19/2017   12:15:08  ( -79.59,  73.76)    0.49                44
 05/22/2017   03:41:32   (  79.36,  20.41) 05/22/2017   03:41:25  (  79.36,  20.32)    1.94                 7
 05/22/2017   04:30:52   ( -79.63,-170.10) 05/22/2017   04:32:02  ( -79.63,-170.10)    0.30                70
 05/24/2017   19:08:37   ( -79.25, -32.11) 05/24/2017   19:07:38  ( -79.25, -32.08)    0.59                59
 05/24/2017   19:57:57   (  79.47, 137.04) 05/24/2017   19:58:16  (  79.47, 136.96)    1.89                19
 05/27/2017   11:25:04   ( -79.32,  84.24) 05/27/2017   11:24:31  ( -79.32,  84.27)    0.70                33