Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2019 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2019   18:10:58   (   0.00, -75.21) (   0.92, -71.20)  457.03                80
 09/20/2019   06:32:45   (  -0.01, -75.20) (   0.28, -76.46)  143.56                80
 09/21/2019   06:11:21   (  -0.01, -75.21) (  -0.75, -71.93)  373.34                80
 09/22/2019   18:33:17   (   0.01, -75.22) (  -0.43, -77.24)  229.29                80
 09/23/2019   18:17:12   (   0.01, -75.23) (   0.60, -72.71)  287.91                80
 09/25/2019   06:39:00   (  -0.01, -75.23) (   0.61, -77.97)  311.98                80
 09/26/2019   06:17:35   (  -0.01, -75.24) (  -0.42, -73.44)  205.49                80
 09/27/2019   18:39:32   (   0.01, -75.26) (  -0.75, -78.74)  396.18                80
 09/28/2019   18:23:26   (   0.01, -75.27) (   0.22, -74.20)  121.89                80
 09/30/2019   06:45:14   (  -0.01, -75.29) (   0.93, -79.47)  476.56                80
 10/01/2019   06:23:50   (  -0.00, -75.31) (  -0.10, -74.94)   41.68                80