Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 16.  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)
 04/17/2018   19:58:35   ( -79.58, -42.20) 04/17/2018   19:58:16  ( -79.58, -42.16)    0.70                19
 04/17/2018   20:47:55   (  79.80, 127.11) 04/17/2018   20:48:53  (  79.81, 127.19)    1.49                58
 04/20/2018   11:25:41   (  79.42, -95.07) 04/20/2018   11:24:31  (  79.42, -95.03)    0.63                70
 04/20/2018   12:15:02   ( -79.64,  74.15) 04/20/2018   12:15:10  ( -79.64,  74.12)    0.69                 8
 04/23/2018   03:42:07   (  79.48,  21.23) 04/23/2018   03:41:24  (  79.47,  21.21)    0.41                43
 04/23/2018   04:31:28   ( -79.70,-169.53) 04/23/2018   04:32:03  ( -79.69,-169.60)    1.65                35
 04/25/2018   19:58:34   (  79.53, 137.50) 04/25/2018   19:58:18  (  79.53, 137.45)    1.03                16
 04/25/2018   20:47:55   ( -79.76, -53.23) 04/25/2018   20:48:57  ( -79.75, -53.34)    2.23                62
 04/28/2018   11:25:41   ( -79.36,  84.56) 04/28/2018   11:24:35  ( -79.35,  84.47)    1.90                66