Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2017   06:23:41   (   0.02, -75.17) (  -0.03, -75.01)   17.89                80
 01/01/2018   18:29:31   (  -0.03, -75.19) (  -0.16, -75.78)   67.34                80
 01/02/2018   18:08:05   (  -0.03, -75.19) (   0.83, -71.24)  449.18                80
 01/04/2018   06:32:33   (   0.03, -75.16) (   0.34, -76.51)  153.85                80
 01/05/2018   06:11:07   (   0.03, -75.17) (  -0.66, -71.98)  363.08                80
 01/06/2018   18:35:43   (  -0.04, -75.20) (  -0.52, -77.28)  237.10                80
 01/07/2018   18:14:18   (  -0.03, -75.21) (   0.53, -72.75)  280.41                80
 01/09/2018   06:38:44   (   0.04, -75.20) (   0.70, -78.01)  321.05                80
 01/10/2018   06:17:20   (   0.04, -75.21) (  -0.36, -73.49)  196.85                80
 01/11/2018   18:41:55   (  -0.05, -75.26) (  -0.82, -78.79)  401.99                80
 01/12/2018   18:20:30   (  -0.05, -75.27) (   0.18, -74.25)  116.25                80