Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/19/2018   06:19:45   (   0.01, -75.20) (  -0.42, -73.39)  206.90                80
 06/20/2018   18:39:00   (  -0.02, -75.20) (  -0.81, -78.68)  397.24                80
 06/21/2018   18:22:55   (  -0.02, -75.20) (   0.22, -74.15)  119.79                80
 06/23/2018   06:44:43   (   0.02, -75.21) (   0.97, -79.41)  479.27                80
 06/24/2018   06:25:58   (   0.01, -75.22) (  -0.06, -74.89)   37.72                80
 06/26/2018   18:26:30   (   0.02, -75.23) (  -0.08, -75.66)   48.64                80
 06/27/2018   18:10:26   (   0.02, -75.25) (   0.95, -71.13)  469.14                80
 06/29/2018   06:32:13   (  -0.01, -75.27) (   0.23, -76.40)  128.65                80
 06/30/2018   06:13:27   (  -0.01, -75.28) (  -0.75, -71.86)  389.54                80
 07/01/2018   18:32:44   (   0.00, -75.30) (  -0.43, -77.16)  212.42                80
 07/02/2018   18:16:39   (  -0.00, -75.32) (   0.61, -72.63)  306.18                80