Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2018   06:32:46   (   0.01, -75.21) (   0.30, -76.56)  153.48                80
 12/23/2018   06:11:20   (   0.02, -75.21) (  -0.67, -72.02)  363.88                80
 12/24/2018   18:33:16   (  -0.02, -75.23) (  -0.50, -77.32)  238.85                80
 12/25/2018   18:17:12   (  -0.02, -75.24) (   0.53, -72.80)  278.85                80
 12/27/2018   06:38:59   (   0.02, -75.26) (   0.66, -78.06)  319.43                80
 12/28/2018   06:17:35   (   0.02, -75.28) (  -0.38, -73.54)  198.54                80
 12/29/2018   18:39:31   (  -0.02, -75.30) (  -0.79, -78.85)  403.02                80
 12/30/2018   18:23:26   (  -0.02, -75.33) (   0.18, -74.31)  115.64                80
 01/01/2019   06:45:14   (   0.03, -75.36) (   0.95, -79.59)  480.99                80
 01/02/2019   06:23:48   (   0.03, -75.38) (  -0.03, -75.05)   37.86                80