Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 8 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)
 08/31/2017   10:35:23   (  79.07, -84.89) 08/31/2017   10:34:21  (  79.07, -84.89)    0.20                62
 08/31/2017   11:24:44   ( -79.31,  84.24) 08/31/2017   11:25:00  ( -79.30,  84.11)    2.76                16
 09/03/2017   02:51:48   (  79.21,  31.88) 09/03/2017   02:51:14  (  79.22,  31.94)    1.35                34
 09/03/2017   03:41:09   ( -79.45,-158.94) 09/03/2017   03:41:53  ( -79.44,-159.01)    1.60                44
 09/05/2017   19:08:16   (  79.23, 147.87) 09/05/2017   19:08:11  (  79.22, 147.73)    3.01                 5
 09/05/2017   19:57:35   ( -79.54, -42.41) 09/05/2017   19:58:47  ( -79.54, -42.40)    0.36                72
 09/08/2017   10:35:22   ( -79.05,  94.99) 09/08/2017   10:34:28  ( -79.04,  94.86)    2.95                54
 09/08/2017   11:24:39   (  79.40, -95.16) 09/08/2017   11:25:02  (  79.39, -95.17)    0.29                23
 09/11/2017   02:51:46   ( -79.21,-148.11) 09/11/2017   02:51:20  ( -79.21,-148.10)    0.21                26