Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2017   06:20:09   (   0.01, -75.18) (  -0.38, -73.51)  190.65                80
 12/26/2017   18:42:04   (  -0.02, -75.24) (  -0.81, -78.81)  407.57                80
 12/27/2017   18:20:39   (  -0.02, -75.25) (   0.18, -74.28)  110.55                80
 12/29/2017   06:42:26   (   0.02, -75.24) (   0.98, -79.55)  491.05                80
 12/30/2017   06:26:21   (   0.02, -75.25) (  -0.01, -75.01)   27.32                80
 01/01/2018   18:29:32   (  -0.03, -75.33) (  -0.12, -75.79)   51.97                80
 01/02/2018   18:08:06   (  -0.03, -75.35) (   0.88, -71.25)  466.52                80
 01/04/2018   06:32:33   (   0.04, -75.34) (   0.29, -76.52)  134.30                80
 01/05/2018   06:11:08   (   0.04, -75.36) (  -0.71, -71.99)  384.67                80
 01/06/2018   18:35:43   (  -0.04, -75.44) (  -0.47, -77.29)  211.41                80
 01/07/2018   18:14:18   (  -0.04, -75.46) (   0.54, -72.75)  308.07                80