Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/14/2018   06:44:57   (   0.01, -75.18) (   0.96, -79.52)  494.13                80
 01/15/2018   06:23:32   (   0.01, -75.19) (  -0.04, -74.99)   23.00                80
 01/17/2018   18:29:22   (  -0.02, -75.24) (  -0.14, -75.75)   58.90                80
 01/18/2018   18:07:57   (  -0.01, -75.25) (   0.92, -71.23)  458.69                80
 01/20/2018   06:32:24   (   0.01, -75.23) (   0.30, -76.49)  143.48                80
 01/21/2018   06:10:58   (   0.01, -75.24) (  -0.70, -71.95)  374.34                80
 01/22/2018   18:35:33   (  -0.01, -75.30) (  -0.48, -77.25)  223.83                80
 01/23/2018   18:14:09   (  -0.01, -75.31) (   0.58, -72.73)  294.38                80
 01/25/2018   06:38:35   (   0.01, -75.30) (   0.64, -77.99)  306.80                80
 01/26/2018   06:17:11   (   0.01, -75.32) (  -0.42, -73.47)  211.44                80
 01/27/2018   18:41:46   (  -0.02, -75.37) (  -0.75, -78.77)  386.36                80