Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 5 20.  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)
 05/22/2018   11:25:33   (  79.30, -95.84) 05/22/2018   11:24:38  (  79.29, -95.96)    2.58                55
 05/22/2018   12:14:53   ( -79.57,  73.62) 05/22/2018   12:15:15  ( -79.57,  73.61)    0.23                22
 05/25/2018   03:41:56   (  79.46,  21.08) 05/25/2018   03:41:27  (  79.47,  21.21)    3.00                29
 05/25/2018   04:31:18   ( -79.65,-169.92) 05/25/2018   04:32:07  ( -79.65,-169.99)    1.48                49
 05/27/2018   19:58:22   (  79.53, 137.46) 05/27/2018   19:58:20  (  79.54, 137.58)    2.70                 2
 05/27/2018   20:46:38   ( -81.53, -31.26) 05/27/2018   20:47:52  ( -81.18, -30.75)   40.06                74
 05/30/2018   11:25:30   ( -79.31,  84.18) 05/30/2018   11:24:38  ( -79.30,  84.10)    1.89                52
 05/30/2018   12:14:47   (  79.64,-105.91) 05/30/2018   12:15:12  (  79.64,-105.77)    2.90                25
 06/02/2018   03:41:55   ( -79.41,-159.23) 06/02/2018   03:41:30  ( -79.41,-159.30)    1.69                25