Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 5 9.  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)
 05/11/2018   19:58:28   (  79.49, 137.14) 05/11/2018   19:58:21  (  79.48, 137.08)    1.33                 7
 05/11/2018   20:47:47   ( -79.78, -53.09) 05/11/2018   20:48:57  ( -79.79, -52.96)    2.68                70
 05/14/2018   11:25:34   ( -79.36,  84.48) 05/14/2018   11:24:36  ( -79.35,  84.49)    0.20                58
 05/14/2018   12:14:53   (  79.62,-106.04) 05/14/2018   12:15:12  (  79.63,-105.93)    2.21                19
 05/17/2018   03:42:02   ( -79.38,-159.50) 05/17/2018   03:41:31  ( -79.37,-159.63)    2.75                31
 05/17/2018   04:31:20   (  79.67,  10.22) 05/17/2018   04:32:06  (  79.67,  10.23)    0.24                46
 05/19/2018   19:58:26   ( -79.54, -42.49) 05/19/2018   19:58:21  ( -79.54, -42.42)    1.50                 5
 05/19/2018   20:47:47   (  79.72, 126.46) 05/19/2018   20:49:00  (  79.71, 126.38)    1.75                73
 05/22/2018   11:25:33   (  79.31, -95.81) 05/22/2018   11:24:38  (  79.30, -95.91)    2.24                55