Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/08/2019   18:43:12   (   0.00, -75.20) (  -0.79, -78.61)  389.40                80
 05/09/2019   18:26:57   (   0.00, -75.19) (   0.25, -74.04)  131.17                80
 05/11/2019   06:48:30   (  -0.00, -75.19) (   0.91, -79.25)  462.95                80
 05/12/2019   06:26:55   (  -0.00, -75.19) (  -0.13, -74.68)   57.92                80
 05/14/2019   18:29:41   (   0.00, -75.20) (  -0.05, -75.35)   18.13                80
 05/17/2019   06:34:59   (  -0.00, -75.21) (   0.16, -76.00)   88.96                80
 05/18/2019   06:13:24   (  -0.01, -75.22) (  -0.87, -71.43)  432.81                80
 05/19/2019   18:35:06   (   0.01, -75.24) (  -0.29, -76.68)  163.32                80
 05/20/2019   18:18:50   (   0.01, -75.25) (   0.69, -72.10)  358.84                80