Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 9 19.  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)
 09/21/2017   18:20:02   ( -76.17, -33.37) 09/21/2017   18:18:48  ( -76.35, -34.30)   31.67                74
 09/21/2017   19:08:17   (  79.31, 148.39) 09/21/2017   19:08:19  (  79.30, 148.37)    0.59                 2
 09/24/2017   10:35:26   ( -79.11,  95.34) 09/24/2017   10:34:36  ( -79.11,  95.34)    0.18                50
 09/24/2017   11:24:46   (  79.34, -95.54) 09/24/2017   11:25:14  (  79.33, -95.65)    2.60                28
 09/27/2017   02:51:55   ( -79.18,-148.36) 09/27/2017   02:51:31  ( -79.17,-148.43)    1.75                24
 09/27/2017   03:41:12   (  79.52,  21.55) 09/27/2017   03:42:05  (  79.52,  21.66)    2.28                53
 09/29/2017   18:20:23   (  75.31, 144.08) 09/29/2017   18:19:10  (  75.50, 142.84)   40.53                73
 09/29/2017   19:08:24   ( -79.24, -32.08) 09/29/2017   19:08:26  ( -79.23, -32.22)    3.12                 2
 10/02/2017   10:35:30   (  79.13, -84.56) 10/02/2017   10:34:40  (  79.13, -84.48)    1.73                50