Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 5 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2018   18:32:48   (  -0.00, -75.20) (  -0.43, -77.22)  230.20                80
 05/15/2018   18:16:43   (  -0.00, -75.20) (   0.59, -72.69)  286.41                80
 05/17/2018   06:38:30   (  -0.00, -75.20) (   0.63, -77.95)  314.29                80
 05/18/2018   06:17:06   (  -0.01, -75.20) (  -0.39, -73.42)  202.19                80
 05/19/2018   18:39:02   (   0.01, -75.20) (  -0.79, -78.72)  401.61                80
 05/20/2018   18:22:58   (   0.01, -75.21) (   0.23, -74.19)  115.32                80
 05/22/2018   06:44:46   (  -0.01, -75.22) (   0.93, -79.46)  484.17                80
 05/23/2018   06:23:22   (  -0.01, -75.22) (  -0.09, -74.94)   33.19                80
 05/25/2018   18:26:33   (   0.01, -75.26) (  -0.07, -75.71)   51.33                80
 05/26/2018   18:10:29   (   0.02, -75.27) (   0.96, -71.18)  466.79                80