Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 6.  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)
 04/07/2018   03:42:09   (  79.45,  21.06) 04/07/2018   03:41:21  (  79.45,  21.02)    0.84                48
 04/07/2018   04:31:30   ( -79.68,-169.70) 04/07/2018   04:32:00  ( -79.67,-169.84)    3.18                30
 04/09/2018   19:58:34   (  79.61, 138.04) 04/09/2018   19:58:12  (  79.61, 138.14)    2.12                22
 04/09/2018   20:47:56   ( -79.80, -52.94) 04/09/2018   20:48:52  ( -79.79, -52.94)    0.30                56
 04/12/2018   11:25:44   ( -79.35,  84.47) 04/12/2018   11:24:32  ( -79.34,  84.37)    2.19                72
 04/12/2018   12:15:03   (  79.61,-106.07) 04/12/2018   12:15:08  (  79.61,-106.12)    1.00                 5
 04/15/2018   03:42:08   ( -79.50,-158.63) 04/15/2018   03:41:22  ( -79.50,-158.55)    1.66                46
 04/15/2018   04:31:27   (  79.76,  10.88) 04/15/2018   04:31:58  (  79.76,  11.01)    2.78                31
 04/17/2018   19:58:35   ( -79.57, -42.27) 04/17/2018   19:58:16  ( -79.56, -42.29)    0.54                19
 04/17/2018   20:47:55   (  79.79, 126.98) 04/17/2018   20:48:53  (  79.79, 127.00)    0.51                58
 04/20/2018   11:25:41   (  79.40, -95.19) 04/20/2018   11:24:31  (  79.39, -95.23)    0.87                70