Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 5 23.  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)
 05/25/2018   03:41:56   (  79.48,  21.25) 05/25/2018   03:41:27  (  79.49,  21.39)    2.96                29
 05/25/2018   04:31:19   ( -79.64,-170.04) 05/25/2018   04:32:08  ( -79.63,-170.10)    1.38                49
 05/27/2018   19:58:22   (  79.56, 137.63) 05/27/2018   19:58:20  (  79.56, 137.76)    2.58                 2
 05/27/2018   20:46:39   ( -81.52, -31.43) 05/27/2018   20:47:53  ( -81.17, -30.91)   39.79                74
 05/30/2018   11:25:30   ( -79.29,  84.08) 05/30/2018   11:24:38  ( -79.29,  83.99)    2.04                52
 05/30/2018   12:14:47   (  79.62,-106.00) 05/30/2018   12:15:12  (  79.63,-105.88)    2.66                25
 06/02/2018   03:41:55   ( -79.40,-159.33) 06/02/2018   03:41:30  ( -79.39,-159.42)    2.04                25
 06/02/2018   04:31:13   (  79.69,  10.34) 06/02/2018   04:32:05  (  79.70,  10.48)    3.19                52
 06/04/2018   19:10:02   (  76.47, 135.21) 06/04/2018   19:08:49  (  76.63, 134.09)   34.27                73