Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 4 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2019   18:24:16   (   0.00, -75.20) (   0.39, -73.35)  209.99                80
 04/20/2019   06:45:49   (  -0.00, -75.20) (   0.74, -78.57)  383.93                80
 04/21/2019   06:24:14   (  -0.00, -75.20) (  -0.30, -74.00)  137.19                80
 04/22/2019   18:45:55   (   0.00, -75.21) (  -0.90, -79.24)  459.55                80
 04/23/2019   18:29:40   (   0.01, -75.22) (   0.14, -74.68)   61.99                80
 04/26/2019   06:32:18   (  -0.00, -75.24) (   0.01, -75.32)    8.87                80
 04/28/2019   18:32:24   (   0.00, -75.27) (  -0.17, -75.99)   82.28                80
 04/29/2019   18:16:10   (   0.00, -75.28) (   0.87, -71.42)  440.25                80
 05/01/2019   06:37:42   (  -0.00, -75.31) (   0.31, -76.63)  150.79                80