Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 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)
 09/19/2017   02:51:47   (  79.27,  32.25) 09/19/2017   02:51:23  (  79.27,  32.35)    2.06                24
 09/19/2017   03:41:09   ( -79.46,-158.83) 09/19/2017   03:42:03  ( -79.45,-158.92)    2.02                54
 09/21/2017   18:20:02   ( -76.16, -33.38) 09/21/2017   18:18:48  ( -76.34, -34.32)   31.71                74
 09/21/2017   19:08:17   (  79.30, 148.36) 09/21/2017   19:08:19  (  79.30, 148.34)    0.43                 2
 09/24/2017   10:35:26   ( -79.10,  95.30) 09/24/2017   10:34:36  ( -79.10,  95.33)    0.60                50
 09/24/2017   11:24:46   (  79.33, -95.57) 09/24/2017   11:25:14  (  79.33, -95.68)    2.16                28
 09/27/2017   02:51:55   ( -79.17,-148.40) 09/27/2017   02:51:31  ( -79.17,-148.44)    0.87                24
 09/27/2017   03:41:12   (  79.51,  21.50) 09/27/2017   03:42:05  (  79.52,  21.64)    3.21                53
 09/29/2017   18:20:11   (  75.89, 145.76) 09/29/2017   18:18:58  (  76.05, 144.65)   34.74                73
 09/29/2017   19:08:23   ( -79.27, -31.89) 09/29/2017   19:08:25  ( -79.26, -31.96)    1.58                 2
 10/02/2017   10:35:32   (  79.03, -85.13) 10/02/2017   10:34:43  (  79.03, -85.23)    2.27                49