Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 13.  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   ( -79.50,-158.58) 04/15/2018   03:41:22  ( -79.51,-158.48)    2.40                46
 04/15/2018   04:31:30   (  79.66,  10.15) 04/15/2018   04:32:02  (  79.65,  10.00)    3.13                32
 04/17/2018   19:58:35   ( -79.57, -42.22) 04/17/2018   19:58:16  ( -79.58, -42.18)    0.86                19
 04/17/2018   20:47:55   (  79.80, 127.07) 04/17/2018   20:48:53  (  79.80, 127.15)    1.74                58
 04/20/2018   11:25:41   (  79.41, -95.11) 04/20/2018   11:24:31  (  79.41, -95.06)    1.28                70
 04/20/2018   12:15:02   ( -79.64,  74.11) 04/20/2018   12:15:10  ( -79.64,  74.11)    0.08                 8
 04/23/2018   03:42:06   (  79.51,  21.43) 04/23/2018   03:41:23  (  79.51,  21.48)    0.90                43
 04/23/2018   04:31:28   ( -79.69,-169.58) 04/23/2018   04:32:03  ( -79.70,-169.60)    0.44                35
 04/25/2018   19:58:32   (  79.60, 137.96) 04/25/2018   19:58:16  (  79.60, 138.02)    1.18                16