Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 3 23.  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)
 03/24/2018   19:58:34   (  79.58, 137.90) 03/24/2018   19:58:08  (  79.57, 137.80)    2.31                26
 03/24/2018   20:47:55   ( -79.81, -52.76) 03/24/2018   20:48:46  ( -79.81, -52.76)    0.16                51
 03/27/2018   11:27:25   ( -74.67,  65.96) 03/27/2018   11:26:12  ( -74.93,  64.23)   57.94                73
 03/27/2018   12:14:59   (  79.71,-105.29) 03/27/2018   12:15:00  (  79.71,-105.27)    0.47                 1
 03/30/2018   03:42:06   ( -79.54,-158.25) 03/30/2018   03:41:17  ( -79.54,-158.22)    0.63                49
 03/30/2018   04:31:27   (  79.72,  10.67) 03/30/2018   04:31:56  (  79.71,  10.54)    2.76                29
 04/01/2018   19:58:32   ( -79.59, -42.06) 04/01/2018   19:58:11  ( -79.58, -42.14)    1.67                21
 04/01/2018   20:47:51   (  79.83, 127.43) 04/01/2018   20:48:47  (  79.84, 127.48)    1.12                56
 04/04/2018   11:25:36   (  79.46, -94.68) 04/04/2018   11:24:25  (  79.46, -94.71)    0.64                71