Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2018   18:27:02   (  -0.01, -75.20) (  -0.17, -75.81)   70.45                80
 12/20/2018   18:10:58   (  -0.02, -75.21) (   0.86, -71.28)  447.16                80
 12/22/2018   06:32:45   (   0.02, -75.22) (   0.32, -76.55)  151.63                80
 12/23/2018   06:11:21   (   0.02, -75.23) (  -0.71, -72.02)  365.86                80
 12/24/2018   18:33:17   (  -0.03, -75.25) (  -0.47, -77.33)  236.81                80
 12/25/2018   18:17:12   (  -0.03, -75.26) (   0.51, -72.79)  281.06                80
 12/27/2018   06:39:00   (   0.03, -75.29) (   0.62, -78.07)  316.75                80
 12/28/2018   06:17:34   (   0.03, -75.30) (  -0.35, -73.53)  201.42                80
 12/29/2018   18:42:11   (  -0.03, -75.33) (  -0.82, -78.84)  400.02                80
 12/30/2018   18:20:46   (  -0.03, -75.35) (   0.22, -74.31)  118.78                80
 01/01/2019   06:45:14   (   0.04, -75.39) (   0.98, -79.58)  477.38                80
 01/02/2019   06:23:49   (   0.04, -75.42) (  -0.06, -75.05)   41.61                80