Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 6 30.  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)
 07/01/2017   02:53:33   (  74.74,  14.33) 07/01/2017   02:52:20  (  74.96,  12.88)   49.00                73
 07/01/2017   03:41:18   ( -79.42,-159.15) 07/01/2017   03:41:19  ( -79.42,-159.10)    1.06                 1
 07/03/2017   19:08:26   (  79.16, 147.42) 07/03/2017   19:07:36  (  79.16, 147.33)    2.10                50
 07/03/2017   19:57:46   ( -79.45, -43.06) 07/03/2017   19:58:13  ( -79.45, -43.13)    1.51                27
 07/06/2017   11:24:50   (  79.35, -95.54) 07/06/2017   11:24:25  (  79.35, -95.44)    2.14                25
 07/06/2017   12:14:11   ( -79.59,  73.79) 07/06/2017   12:15:03  ( -79.60,  73.92)    2.84                52
 07/09/2017   02:53:52   ( -73.75,-167.98) 07/09/2017   02:52:39  ( -74.00,-169.66)   58.63                73
 07/09/2017   03:41:16   (  79.40,  20.73) 07/09/2017   03:41:17  (  79.40,  20.75)    0.50                 1
 07/11/2017   19:08:24   ( -79.21, -32.30) 07/11/2017   19:07:33  ( -79.21, -32.25)    1.15                51
 07/11/2017   19:57:43   (  79.46, 136.97) 07/11/2017   19:58:10  (  79.45, 136.94)    0.77                27
 07/14/2017   11:24:50   ( -79.30,  84.17) 07/14/2017   11:24:25  ( -79.30,  84.19)    0.51                25