Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 8 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)
 08/20/2017   19:08:16   (  79.27, 148.13) 08/20/2017   19:07:57  (  79.28, 148.17)    1.03                19
 08/20/2017   19:57:37   ( -79.51, -42.66) 08/20/2017   19:58:36  ( -79.50, -42.73)    1.59                59
 08/23/2017   10:35:26   ( -79.01,  94.74) 08/23/2017   10:34:18  ( -79.00,  94.63)    2.37                68
 08/23/2017   11:24:43   (  79.36, -95.42) 08/23/2017   11:24:52  (  79.36, -95.44)    0.49                 9
 08/26/2017   02:51:49   ( -79.21,-148.12) 08/26/2017   02:51:08  ( -79.22,-148.00)    2.84                41
 08/26/2017   03:41:09   (  79.44,  21.01) 08/26/2017   03:41:46  (  79.43,  20.95)    1.48                37
 08/28/2017   19:08:15   ( -79.33, -31.47) 08/28/2017   19:08:02  ( -79.34, -31.37)    2.20                13
 08/28/2017   19:57:36   (  79.52, 137.42) 08/28/2017   19:58:41  (  79.51, 137.33)    1.95                65
 08/31/2017   10:35:24   (  79.04, -85.05) 08/31/2017   10:34:22  (  79.04, -85.11)    1.28                62