Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 12 18.  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   18:29:43   (  -0.01, -75.17) (  -0.15, -75.81)   72.87                80
 12/20/2018   18:08:18   (  -0.01, -75.18) (   0.88, -71.29)  444.52                80
 12/22/2018   06:32:45   (   0.01, -75.20) (   0.31, -76.55)  154.57                80
 12/23/2018   06:11:21   (   0.01, -75.20) (  -0.72, -72.03)  362.65                80
 12/24/2018   18:35:56   (  -0.01, -75.22) (  -0.51, -77.32)  240.33                80
 12/25/2018   18:14:32   (  -0.00, -75.23) (   0.52, -72.80)  277.25                80
 12/27/2018   06:39:00   (   0.00, -75.25) (   0.61, -78.08)  320.96                80
 12/28/2018   06:17:35   (  -0.00, -75.27) (  -0.37, -73.54)  196.98                80
 12/29/2018   18:42:11   (  -0.00, -75.30) (  -0.80, -78.84)  404.60                80
 12/30/2018   18:20:47   (   0.00, -75.32) (   0.24, -74.32)  113.97                80
 01/01/2019   06:45:14   (   0.01, -75.35) (   0.96, -79.59)  482.49                80