Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 5 18.  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)
 05/19/2017   11:25:04   (  79.32, -95.75) 05/19/2017   11:24:31  (  79.31, -95.80)    1.29                33
 05/19/2017   12:14:24   ( -79.58,  73.70) 05/19/2017   12:15:08  ( -79.59,  73.74)    0.88                44
 05/22/2017   03:41:31   (  79.39,  20.63) 05/22/2017   03:41:24  (  79.39,  20.58)    0.96                 7
 05/22/2017   04:30:51   ( -79.66,-169.89) 05/22/2017   04:32:01  ( -79.66,-169.84)    0.95                70
 05/24/2017   19:08:36   ( -79.27, -31.94) 05/24/2017   19:07:37  ( -79.28, -31.83)    2.49                59
 05/24/2017   19:57:56   (  79.50, 137.23) 05/24/2017   19:58:15  (  79.50, 137.23)    0.12                19
 05/27/2017   11:25:05   ( -79.26,  83.87) 05/27/2017   11:24:33  ( -79.25,  83.75)    2.55                32
 05/27/2017   12:14:22   (  79.60,-106.19) 05/27/2017   12:15:07  (  79.61,-106.11)    1.71                45
 05/30/2017   03:41:30   ( -79.40,-159.35) 05/30/2017   03:41:24  ( -79.40,-159.37)    0.52                 6