Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 6 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2018   06:42:03   (  -0.00, -75.20) (   0.97, -79.41)  481.12                80
 06/24/2018   06:23:18   (  -0.01, -75.20) (  -0.06, -74.88)   35.60                80
 06/26/2018   18:26:30   (   0.02, -75.21) (  -0.09, -75.66)   51.46                80
 06/27/2018   18:10:26   (   0.01, -75.21) (   0.95, -71.13)  465.94                80
 06/29/2018   06:32:13   (  -0.01, -75.23) (   0.24, -76.40)  132.28                80
 06/30/2018   06:10:47   (  -0.01, -75.24) (  -0.74, -71.85)  385.48                80
 07/01/2018   18:32:44   (   0.00, -75.25) (  -0.44, -77.16)  217.37                80
 07/02/2018   18:16:39   (  -0.00, -75.27) (   0.59, -72.63)  300.83                80
 07/04/2018   06:35:46   (   0.00, -75.30) (   0.59, -77.89)  296.18                80
 07/05/2018   06:19:42   (   0.01, -75.31) (  -0.44, -73.37)  222.28                80