Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 4 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2019   06:40:24   (  -0.00, -75.20) (   0.47, -77.25)  233.58                80
 04/16/2019   06:18:50   (  -0.00, -75.21) (  -0.56, -72.68)  287.60                80
 04/17/2019   18:40:31   (   0.00, -75.22) (  -0.58, -77.93)  308.95                80
 04/18/2019   18:24:16   (   0.00, -75.23) (   0.39, -73.35)  212.86                80
 04/20/2019   06:45:49   (  -0.00, -75.24) (   0.75, -78.57)  379.55                80
 04/21/2019   06:24:15   (   0.00, -75.25) (  -0.28, -74.00)  142.40                80
 04/22/2019   18:45:55   (   0.00, -75.27) (  -0.91, -79.24)  453.32                80
 04/23/2019   18:29:40   (   0.00, -75.28) (   0.12, -74.67)   69.03                80
 04/26/2019   06:29:39   (  -0.01, -75.33) (  -0.02, -75.32)    0.93                80
 04/28/2019   18:32:25   (   0.01, -75.37) (  -0.15, -76.00)   71.45                80