Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 7 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)
 07/12/2018   03:41:51   (  79.34,  20.31) 07/12/2018   03:41:25  (  79.34,  20.28)    0.46                26
 07/12/2018   04:31:12   ( -79.58,-170.40) 07/12/2018   04:32:03  ( -79.59,-170.41)    0.31                51
 07/14/2018   19:58:15   (  79.48, 137.13) 07/14/2018   19:58:14  (  79.49, 137.26)    2.96                 1
 07/14/2018   20:45:50   ( -81.84, -14.58) 07/14/2018   20:47:03  ( -81.26, -14.51)   64.38                73
 07/17/2018   11:25:23   ( -79.29,  84.07) 07/17/2018   11:24:30  ( -79.30,  84.17)    2.19                53
 07/17/2018   12:14:42   (  79.54,-106.58) 07/17/2018   12:15:07  (  79.54,-106.56)    0.44                25
 07/20/2018   03:41:50   ( -79.35,-159.67) 07/20/2018   03:41:23  ( -79.35,-159.65)    0.32                27
 07/20/2018   04:31:10   (  79.56,   9.42) 07/20/2018   04:32:01  (  79.55,   9.34)    1.81                51
 07/22/2018   19:58:17   ( -79.40, -43.43) 07/22/2018   19:58:16  ( -79.40, -43.48)    1.11                 1