Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/29/2017   06:45:06   (   0.01, -75.16) (   0.99, -79.55)  499.60                80
 12/30/2017   06:26:21   (   0.02, -75.15) (  -0.00, -75.01)   16.16                80
 01/01/2018   18:29:31   (  -0.02, -75.16) (  -0.13, -75.79)   70.87                80
 01/02/2018   18:08:06   (  -0.01, -75.15) (   0.86, -71.25)  444.93                80
 01/04/2018   06:32:33   (   0.01, -75.12) (   0.31, -76.52)  159.29                80
 01/05/2018   06:11:08   (   0.00, -75.12) (  -0.69, -71.98)  356.87                80
 01/06/2018   18:35:43   (   0.00, -75.14) (  -0.49, -77.28)  244.36                80
 01/07/2018   18:14:19   (   0.01, -75.15) (   0.56, -72.76)  272.43                80
 01/09/2018   06:38:45   (  -0.00, -75.13) (   0.67, -78.02)  330.07                80
 01/10/2018   06:17:20   (  -0.01, -75.13) (  -0.39, -73.49)  187.17                80