Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 5.  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)
 09/08/2017   10:35:23   ( -79.03,  94.86) 09/08/2017   10:34:29  ( -79.02,  94.73)    2.88                54
 09/08/2017   11:24:40   (  79.38, -95.26) 09/08/2017   11:25:03  (  79.38, -95.28)    0.34                23
 09/11/2017   02:51:46   ( -79.23,-148.00) 09/11/2017   02:51:20  ( -79.23,-147.96)    0.77                26
 09/11/2017   03:41:07   (  79.42,  20.90) 09/11/2017   03:41:59  (  79.42,  20.77)    2.72                52
 09/13/2017   18:19:26   (  77.51, 151.51) 09/13/2017   18:18:12  (  77.64, 151.04)   17.61                74
 09/13/2017   19:08:11   ( -79.31, -31.62) 09/13/2017   19:08:14  ( -79.30, -31.66)    1.00                 3
 09/16/2017   10:35:15   (  79.17, -84.24) 09/16/2017   10:34:29  (  79.18, -84.14)    2.25                46
 09/16/2017   11:24:37   ( -79.37,  84.71) 09/16/2017   11:25:09  ( -79.37,  84.63)    1.78                32
 09/19/2017   02:51:39   (  79.31,  32.53) 09/19/2017   02:51:22  (  79.31,  32.65)    2.65                17