Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 12.  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)
 04/15/2018   03:42:08   ( -79.51,-158.52) 04/15/2018   03:41:22  ( -79.52,-158.41)    2.50                46
 04/15/2018   04:31:30   (  79.66,  10.20) 04/15/2018   04:32:02  (  79.66,  10.06)    2.98                32
 04/17/2018   19:58:35   ( -79.58, -42.17) 04/17/2018   19:58:16  ( -79.58, -42.12)    1.18                19
 04/17/2018   20:47:55   (  79.80, 127.11) 04/17/2018   20:48:53  (  79.81, 127.21)    2.09                58
 04/20/2018   11:25:40   (  79.41, -95.09) 04/20/2018   11:24:30  (  79.42, -95.00)    1.92                70
 04/20/2018   12:15:01   ( -79.64,  74.15) 04/20/2018   12:15:09  ( -79.64,  74.17)    0.55                 8
 04/23/2018   03:42:06   (  79.51,  21.44) 04/23/2018   03:41:23  (  79.51,  21.52)    1.89                43
 04/23/2018   04:31:27   ( -79.73,-169.29) 04/23/2018   04:32:02  ( -79.73,-169.26)    0.61                35
 04/25/2018   19:58:32   (  79.59, 137.94) 04/25/2018   19:58:16  (  79.60, 138.06)    2.60                16