Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 6 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)
 06/14/2018   06:10:50   (  -0.00, -75.19) (  -0.73, -71.88)  377.61                80
 06/15/2018   18:32:46   (   0.01, -75.20) (  -0.45, -77.18)  226.21                80
 06/16/2018   18:16:42   (   0.01, -75.20) (   0.58, -72.65)  290.66                80
 06/18/2018   06:38:29   (  -0.02, -75.21) (   0.61, -77.92)  308.93                80
 06/19/2018   06:17:04   (  -0.02, -75.22) (  -0.42, -73.39)  208.47                80
 06/20/2018   18:39:01   (   0.02, -75.24) (  -0.76, -78.69)  393.92                80
 06/21/2018   18:22:56   (   0.02, -75.25) (   0.27, -74.16)  124.04                80
 06/23/2018   06:44:44   (  -0.02, -75.27) (   0.92, -79.43)  473.92                80
 06/24/2018   06:23:19   (  -0.02, -75.29) (  -0.11, -74.90)   44.32                80
 06/26/2018   18:26:31   (   0.03, -75.33) (  -0.03, -75.67)   38.50                80