Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 7 14.  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)
 07/17/2017   02:53:44   (  73.99,  12.57) 07/17/2017   02:52:31  (  74.24,  10.98)   55.80                73
 07/17/2017   03:41:16   ( -79.37,-159.49) 07/17/2017   03:41:17  ( -79.37,-159.48)    0.27                 1
 07/19/2017   19:08:22   (  79.16, 147.41) 07/19/2017   19:07:32  (  79.16, 147.36)    1.07                50
 07/19/2017   19:57:42   ( -79.45, -43.06) 07/19/2017   19:58:09  ( -79.46, -43.03)    0.65                27
 07/22/2017   11:24:47   (  79.28, -95.97) 07/22/2017   11:24:23  (  79.27, -95.99)    0.39                24
 07/22/2017   12:14:07   ( -79.56,  73.61) 07/22/2017   12:15:00  ( -79.57,  73.69)    1.49                53
 07/25/2017   02:52:49   ( -76.63,-160.10) 07/25/2017   02:51:35  ( -76.79,-160.94)   28.34                74
 07/25/2017   03:41:11   (  79.39,  20.64) 07/25/2017   03:41:13  (  79.39,  20.68)    0.83                 2
 07/27/2017   19:08:19   ( -79.16, -32.55) 07/27/2017   19:07:30  ( -79.16, -32.58)    0.65                49