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)
 04/20/2018   06:44:42   (   0.00, -75.18) (   0.95, -79.47)  487.96                80
 04/21/2018   06:23:18   (   0.02, -75.18) (  -0.06, -74.93)   28.60                80
 04/23/2018   18:26:29   (  -0.01, -75.18) (  -0.14, -75.70)   59.91                80
 04/24/2018   18:10:25   (  -0.02, -75.18) (   0.87, -71.17)  456.99                80
 04/26/2018   06:32:13   (   0.01, -75.20) (   0.29, -76.44)  142.25                80
 04/27/2018   06:10:49   (   0.01, -75.20) (  -0.72, -71.91)  374.97                80
 04/28/2018   18:32:46   (   0.00, -75.22) (  -0.42, -77.23)  228.59                80
 04/29/2018   18:16:42   (   0.01, -75.23) (   0.59, -72.70)  289.05                80
 05/01/2018   06:38:30   (  -0.02, -75.25) (   0.58, -77.97)  308.95                80
 05/02/2018   06:17:05   (  -0.01, -75.27) (  -0.44, -73.44)  209.03                80
 05/03/2018   18:39:02   (   0.02, -75.29) (  -0.75, -78.74)  393.44                80