Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 6 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)
 06/20/2017   11:24:51   (  79.36, -95.42) 06/20/2017   11:24:27  (  79.37, -95.28)    3.07                24
 06/20/2017   12:14:14   ( -79.53,  73.33) 06/20/2017   12:15:08  ( -79.52,  73.19)    2.87                54
 06/23/2017   02:52:05   ( -78.87,-150.20) 06/23/2017   02:50:51  ( -78.89,-150.29)    3.23                74
 06/23/2017   03:41:18   (  79.37,  20.53) 06/23/2017   03:41:22  (  79.37,  20.44)    2.03                 4
 06/25/2017   19:08:23   ( -79.24, -32.09) 06/25/2017   19:07:36  ( -79.24, -32.05)    0.89                47
 06/25/2017   19:57:42   (  79.49, 137.23) 06/25/2017   19:58:13  (  79.49, 137.22)    0.15                31
 06/28/2017   11:24:48   ( -79.28,  84.07) 06/28/2017   11:24:29  ( -79.27,  83.93)    3.11                19
 06/28/2017   12:14:05   (  79.61,-106.09) 06/28/2017   12:15:03  (  79.61,-105.98)    2.33                58
 07/01/2017   02:51:51   (  79.14,  31.40) 07/01/2017   02:50:42  (  79.14,  31.39)    0.44                69