Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 3 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)
 03/22/2018   03:42:07   (  79.54,  21.74) 03/22/2018   03:41:13  (  79.55,  21.83)    2.09                54
 03/22/2018   04:31:30   ( -79.70,-169.48) 03/22/2018   04:31:54  ( -79.69,-169.60)    2.53                24
 03/24/2018   19:58:35   (  79.56, 137.76) 03/24/2018   19:58:09  (  79.56, 137.66)    2.16                26
 03/24/2018   20:47:54   ( -79.83, -52.61) 03/24/2018   20:48:45  ( -79.83, -52.61)    0.17                51
 03/27/2018   11:27:23   ( -74.75,  66.15) 03/27/2018   11:26:10  ( -75.00,  64.44)   57.13                73
 03/27/2018   12:14:59   (  79.69,-105.44) 03/27/2018   12:15:00  (  79.69,-105.42)    0.64                 1
 03/30/2018   03:42:05   ( -79.56,-158.13) 03/30/2018   03:41:16  ( -79.56,-158.09)    0.88                49
 03/30/2018   04:31:26   (  79.73,  10.78) 03/30/2018   04:31:55  (  79.72,  10.66)    2.48                29
 04/01/2018   19:58:32   ( -79.60, -41.95) 04/01/2018   19:58:11  ( -79.60, -42.01)    1.32                21