Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 3 21.  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   03:42:06   (  79.56,  21.84) 03/22/2018   03:41:12  (  79.56,  21.93)    2.02                54
 03/22/2018   04:31:29   ( -79.71,-169.38) 03/22/2018   04:31:53  ( -79.71,-169.50)    2.54                24
 03/24/2018   19:58:34   (  79.58, 137.87) 03/24/2018   19:58:08  (  79.57, 137.76)    2.27                26
 03/24/2018   20:47:55   ( -79.81, -52.79) 03/24/2018   20:48:46  ( -79.81, -52.79)    0.21                51
 03/27/2018   11:27:25   ( -74.67,  65.95) 03/27/2018   11:26:12  ( -74.92,  64.22)   57.99                73
 03/27/2018   12:14:59   (  79.70,-105.33) 03/27/2018   12:15:00  (  79.70,-105.31)    0.41                 1
 03/30/2018   03:42:06   ( -79.54,-158.27) 03/30/2018   03:41:17  ( -79.54,-158.25)    0.47                49
 03/30/2018   04:31:27   (  79.71,  10.64) 03/30/2018   04:31:56  (  79.71,  10.50)    2.91                29
 04/01/2018   19:58:32   ( -79.58, -42.08) 04/01/2018   19:58:11  ( -79.58, -42.18)    1.99                21
 04/01/2018   20:47:51   (  79.83, 127.39) 04/01/2018   20:48:47  (  79.83, 127.43)    0.81                56
 04/04/2018   11:25:36   (  79.46, -94.70) 04/04/2018   11:24:25  (  79.45, -94.76)    1.19                71