Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2017   19:11:26   (  -0.00, -85.49) (  -0.31, -86.87)  158.07                80
 12/04/2017   18:55:17   (  -0.00, -84.15) (   0.43, -82.28)  213.44                80
 12/07/2017   06:55:27   (   0.01, -80.75) (   0.46, -82.86)  239.49                80
 12/08/2017   06:39:16   (   0.02, -79.42) (  -0.23, -78.26)  132.41                80
 12/10/2017   18:39:35   (  -0.02, -76.08) (  -0.64, -78.87)  317.63                80
 12/11/2017   18:23:25   (  -0.02, -74.76) (   0.11, -74.28)   55.05                80
 12/12/2017   18:04:35   (  -0.02, -73.44) (   0.81, -69.68)  428.00                80
 12/14/2017   06:23:35   (   0.03, -71.39) (   0.78, -74.86)  394.76                80
 12/15/2017   06:04:45   (   0.03, -70.07) (   0.09, -70.25)   21.49                80