Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 4 18.  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)
 04/20/2018   11:25:41   (  79.41, -95.07) 04/20/2018   11:24:31  (  79.42, -95.03)    0.74                70
 04/20/2018   12:15:02   ( -79.64,  74.13) 04/20/2018   12:15:10  ( -79.63,  74.11)    0.53                 8
 04/23/2018   03:42:07   (  79.47,  21.21) 04/23/2018   03:41:24  (  79.47,  21.21)    0.14                43
 04/23/2018   04:31:28   ( -79.70,-169.56) 04/23/2018   04:32:03  ( -79.69,-169.62)    1.26                35
 04/25/2018   19:58:33   (  79.56, 137.73) 04/25/2018   19:58:17  (  79.56, 137.72)    0.26                16
 04/25/2018   20:47:55   ( -79.75, -53.28) 04/25/2018   20:48:57  ( -79.75, -53.36)    1.51                62
 04/28/2018   11:25:40   ( -79.39,  84.74) 04/28/2018   11:24:34  ( -79.38,  84.71)    0.72                66
 04/28/2018   12:14:59   (  79.65,-105.77) 04/28/2018   12:15:10  (  79.65,-105.77)    0.13                11
 05/01/2018   03:42:06   ( -79.47,-158.80) 05/01/2018   03:41:27  ( -79.47,-158.81)    0.28                39