Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 3 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/20/2018   06:23:07   (   0.01, -75.20) (  -0.04, -74.90)   33.47                80
 03/22/2018   18:26:20   (  -0.01, -75.23) (  -0.14, -75.68)   52.07                80
 03/23/2018   18:10:17   (  -0.01, -75.24) (   0.92, -71.16)  465.19                80
 03/25/2018   06:32:04   (   0.02, -75.24) (   0.31, -76.42)  134.70                80
 03/26/2018   06:10:41   (   0.01, -75.25) (  -0.75, -71.90)  382.58                80
 03/27/2018   18:32:38   (  -0.02, -75.28) (  -0.42, -77.21)  219.27                80
 03/28/2018   18:16:33   (  -0.02, -75.29) (   0.58, -72.67)  298.70                80
 03/30/2018   06:38:22   (   0.02, -75.31) (   0.59, -77.95)  299.51                80
 03/31/2018   06:16:57   (   0.02, -75.33) (  -0.41, -73.42)  218.71                80
 04/01/2018   18:38:55   (  -0.02, -75.37) (  -0.75, -78.73)  381.91                80