Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2019   18:26:58   (   0.00, -75.19) (   0.26, -74.04)  131.28                80
 05/11/2019   06:48:30   (  -0.00, -75.19) (   0.89, -79.25)  462.79                80
 05/12/2019   06:26:56   (  -0.00, -75.19) (  -0.14, -74.69)   58.15                80
 05/14/2019   18:29:41   (   0.00, -75.20) (  -0.04, -75.35)   17.83                80
 05/17/2019   06:34:59   (  -0.01, -75.22) (   0.15, -76.00)   88.65                80
 05/18/2019   06:13:25   (  -0.01, -75.23) (  -0.88, -71.43)  433.14                80
 05/19/2019   18:35:06   (   0.02, -75.24) (  -0.28, -76.68)  163.04                80
 05/20/2019   18:18:51   (   0.02, -75.26) (   0.70, -72.10)  359.14                80
 05/22/2019   06:40:23   (  -0.02, -75.28) (   0.45, -77.31)  232.29                80