Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2017   06:36:13   (   0.02, -75.16) (   0.69, -78.03)  328.12                80
 12/25/2017   06:20:09   (   0.02, -75.17) (  -0.36, -73.51)  189.03                80
 12/26/2017   18:42:04   (  -0.02, -75.21) (  -0.83, -78.81)  410.39                80
 12/27/2017   18:20:40   (  -0.02, -75.22) (   0.22, -74.29)  106.91                80
 12/29/2017   06:42:26   (   0.01, -75.19) (   1.01, -79.54)  496.20                80
 12/30/2017   06:26:21   (   0.01, -75.20) (  -0.05, -75.02)   21.33                80
 01/01/2018   18:29:31   (  -0.01, -75.26) (  -0.15, -75.78)   60.18                80
 01/02/2018   18:08:07   (  -0.01, -75.27) (   0.91, -71.26)  457.48                80
 01/04/2018   06:32:33   (   0.02, -75.25) (   0.32, -76.52)  144.82                80
 01/05/2018   06:11:09   (   0.01, -75.27) (  -0.74, -71.99)  373.29                80
 01/06/2018   18:35:44   (  -0.01, -75.33) (  -0.44, -77.30)  224.17                80