Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2017   18:42:04   (  -0.01, -75.21) (  -0.81, -78.81)  410.48                80
 12/27/2017   18:20:39   (  -0.01, -75.22) (   0.18, -74.28)  106.95                80
 12/29/2017   06:45:06   (   0.02, -75.20) (   0.99, -79.55)  495.55                80
 12/30/2017   06:26:21   (   0.02, -75.21) (  -0.01, -75.01)   22.11                80
 01/01/2018   18:29:32   (  -0.02, -75.27) (  -0.13, -75.79)   59.20                80
 01/02/2018   18:08:06   (  -0.01, -75.28) (   0.87, -71.25)  458.47                80
 01/04/2018   06:32:33   (   0.01, -75.26) (   0.30, -76.52)  143.63                80
 01/05/2018   06:11:09   (   0.00, -75.28) (  -0.76, -72.00)  374.48                80
 01/06/2018   18:35:44   (  -0.00, -75.34) (  -0.42, -77.30)  222.91                80
 01/07/2018   18:14:19   (   0.00, -75.36) (   0.57, -72.76)  295.76                80
 01/09/2018   06:38:46   (  -0.00, -75.36) (   0.60, -78.03)  304.67                80