Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 4 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2018   06:23:18   (  -0.00, -75.20) (  -0.06, -74.94)   30.19                80
 04/23/2018   18:26:29   (   0.00, -75.22) (  -0.14, -75.70)   56.27                80
 04/24/2018   18:10:26   (   0.00, -75.23) (   0.93, -71.19)  461.39                80
 04/26/2018   06:32:13   (   0.00, -75.25) (   0.29, -76.45)  136.47                80
 04/27/2018   06:10:50   (  -0.00, -75.27) (  -0.78, -71.93)  381.52                80
 04/28/2018   18:32:46   (   0.00, -75.29) (  -0.42, -77.23)  220.55                80
 04/29/2018   18:16:42   (   0.00, -75.31) (   0.60, -72.70)  297.98                80
 05/01/2018   06:38:30   (  -0.00, -75.35) (   0.57, -77.97)  298.47                80
 05/02/2018   06:17:06   (  -0.00, -75.37) (  -0.44, -73.44)  220.22                80
 05/03/2018   18:39:02   (   0.00, -75.40) (  -0.74, -78.74)  381.03                80
 05/04/2018   18:22:57   (  -0.00, -75.42) (   0.27, -74.21)  138.12                80