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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/17/2019   18:40:30   (   0.00, -75.20) (  -0.62, -77.92)  311.08                80
 04/18/2019   18:24:16   (   0.00, -75.20) (   0.41, -73.36)  209.92                80
 04/20/2019   06:45:48   (  -0.00, -75.20) (   0.78, -78.56)  383.70                80
 04/21/2019   06:24:14   (  -0.00, -75.20) (  -0.26, -73.99)  137.50                80
 04/22/2019   18:45:55   (   0.00, -75.21) (  -0.88, -79.25)  459.33                80
 04/23/2019   18:29:40   (  -0.00, -75.22) (   0.10, -74.67)   62.34                80
 04/26/2019   06:32:18   (  -0.00, -75.24) (  -0.01, -75.32)    8.84                80
 04/28/2019   18:32:24   (   0.00, -75.27) (  -0.14, -75.99)   81.95                80
 04/29/2019   18:16:10   (   0.00, -75.29) (   0.89, -71.43)  440.63                80