Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 3 12.  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)
 03/13/2017   19:08:46   (  79.35, 148.70) 03/13/2017   19:07:37  (  79.35, 148.60)    2.19                69
 03/13/2017   19:58:06   ( -79.63, -41.74) 03/13/2017   19:58:14  ( -79.63, -41.75)    0.18                 8
 03/16/2017   11:25:12   (  79.46, -94.72) 03/16/2017   11:24:26  (  79.45, -94.80)    1.79                46
 03/16/2017   12:14:32   ( -79.73,  74.88) 03/16/2017   12:15:03  ( -79.73,  74.91)    0.57                31
 03/19/2017   03:41:40   (  79.52,  21.57) 03/19/2017   03:41:17  (  79.52,  21.52)    0.87                23
 03/19/2017   04:31:00   ( -79.79,-168.80) 03/19/2017   04:31:54  ( -79.79,-168.72)    1.64                54
 03/21/2017   19:11:25   ( -71.82, -55.82) 03/21/2017   19:10:12  ( -72.17, -57.98)   83.44                73
 03/21/2017   19:58:06   (  79.65, 138.37) 03/21/2017   19:58:06  (  79.64, 138.40)    0.67                 0
 03/24/2017   11:25:15   ( -79.45,  85.21) 03/24/2017   11:24:21  ( -79.45,  85.22)    0.20                54