Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 6 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/11/2018   18:10:27   (   0.00, -75.20) (   0.92, -71.15)  461.48                80
 06/13/2018   06:32:15   (  -0.00, -75.19) (   0.28, -76.41)  139.18                80
 06/14/2018   06:10:50   (  -0.01, -75.19) (  -0.75, -71.88)  377.34                80
 06/15/2018   18:32:47   (   0.01, -75.20) (  -0.43, -77.19)  226.39                80
 06/16/2018   18:16:42   (   0.01, -75.20) (   0.60, -72.66)  290.46                80
 06/18/2018   06:38:29   (  -0.02, -75.21) (   0.59, -77.92)  309.27                80
 06/19/2018   06:17:05   (  -0.01, -75.22) (  -0.44, -73.39)  208.16                80
 06/20/2018   18:39:01   (   0.01, -75.23) (  -0.74, -78.70)  394.15                80
 06/21/2018   18:22:56   (   0.01, -75.25) (   0.23, -74.15)  123.84                80
 06/23/2018   06:44:44   (  -0.01, -75.27) (   0.91, -79.43)  474.35                80
 06/24/2018   06:23:20   (  -0.01, -75.28) (  -0.13, -74.90)   43.93                80