Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2017   18:14:27   (  -0.01, -75.19) (   0.52, -72.77)  275.47                80
 12/24/2017   06:36:14   (   0.01, -75.15) (   0.65, -78.04)  329.52                80
 12/25/2017   06:20:08   (   0.01, -75.15) (  -0.34, -73.51)  186.90                80
 12/26/2017   18:42:04   (  -0.01, -75.19) (  -0.85, -78.81)  413.23                80
 12/27/2017   18:20:39   (  -0.02, -75.18) (   0.20, -74.28)  103.30                80
 12/30/2017   06:26:21   (   0.02, -75.15) (  -0.03, -75.02)   15.59                80
 01/01/2018   18:29:31   (  -0.03, -75.19) (  -0.16, -75.78)   67.19                80
 01/02/2018   18:08:06   (  -0.03, -75.19) (   0.83, -71.24)  449.67                80
 01/04/2018   06:32:33   (   0.03, -75.16) (   0.34, -76.51)  154.17                80