Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 3 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)
 03/22/2018   18:26:20   (  -0.01, -75.23) (  -0.13, -75.68)   52.01                80
 03/23/2018   18:10:17   (  -0.01, -75.24) (   0.93, -71.16)  465.21                80
 03/25/2018   06:32:04   (   0.02, -75.24) (   0.29, -76.42)  134.66                80
 03/26/2018   06:10:41   (   0.01, -75.25) (  -0.77, -71.90)  382.61                80
 03/27/2018   18:32:37   (  -0.02, -75.28) (  -0.47, -77.20)  219.23                80
 03/28/2018   18:16:34   (  -0.02, -75.29) (   0.59, -72.68)  298.74                80
 03/30/2018   06:38:21   (   0.02, -75.31) (   0.63, -77.94)  299.46                80
 03/31/2018   06:16:58   (   0.02, -75.33) (  -0.43, -73.42)  218.77                80
 04/01/2018   18:38:54   (  -0.02, -75.37) (  -0.80, -78.72)  381.86                80
 04/02/2018   18:22:50   (  -0.02, -75.39) (   0.27, -74.20)  136.99                80