Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2019   06:48:30   (   0.00, -75.19) (   0.92, -79.25)  462.56                80
 05/12/2019   06:26:55   (   0.01, -75.19) (  -0.12, -74.68)   58.56                80
 05/14/2019   18:29:41   (  -0.01, -75.20) (  -0.07, -75.35)   17.37                80
 05/17/2019   06:32:19   (   0.00, -75.22) (   0.19, -75.99)   88.12                80
 05/18/2019   06:13:24   (  -0.00, -75.23) (  -0.85, -71.42)  433.71                80
 05/19/2019   18:35:06   (   0.01, -75.25) (  -0.32, -76.67)  162.44                80
 05/20/2019   18:18:51   (   0.01, -75.26) (   0.72, -72.10)  359.90                80
 05/22/2019   06:37:43   (  -0.01, -75.28) (   0.43, -77.32)  231.39                80
 05/23/2019   06:21:28   (  -0.00, -75.30) (  -0.55, -72.74)  291.30                80