Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2016 4 25.  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)
 04/27/2016   18:20:31   ( -76.21, -33.33) 04/27/2016   18:19:17  ( -76.39, -34.25)   31.23                74
 04/27/2016   19:08:46   (  79.33, 148.42) 04/27/2016   19:08:48  (  79.34, 148.44)    0.42                 2
 04/30/2016   10:35:51   ( -79.17,  95.63) 04/30/2016   10:35:04  ( -79.17,  95.67)    0.96                47
 04/30/2016   11:25:10   (  79.43, -95.03) 04/30/2016   11:25:41  (  79.43, -95.08)    1.02                31
 05/03/2016   02:52:15   ( -79.27,-147.89) 05/03/2016   02:51:57  ( -79.27,-147.87)    0.31                18
 05/03/2016   03:41:34   (  79.52,  21.47) 05/03/2016   03:42:34  (  79.52,  21.41)    1.37                60
 05/05/2016   18:19:18   (  79.06, 159.08) 05/05/2016   18:18:12  (  79.06, 159.07)    0.18                66
 05/05/2016   19:08:37   ( -79.39, -31.20) 05/05/2016   19:08:48  ( -79.39, -31.16)    0.74                11
 05/08/2016   10:35:40   (  79.22, -84.07) 05/08/2016   10:35:03  (  79.22, -84.01)    1.39                37