Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 5 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/01/2019   06:37:42   (   0.00, -75.20) (   0.32, -76.63)  162.94                80
 05/02/2019   06:16:08   (   0.00, -75.20) (  -0.71, -72.06)  358.41                80
 05/03/2019   18:37:49   (  -0.00, -75.22) (  -0.44, -77.31)  237.15                80
 05/04/2019   18:21:34   (  -0.00, -75.23) (   0.54, -72.73)  284.56                80
 05/06/2019   06:43:06   (   0.00, -75.23) (   0.63, -77.94)  309.11                80
 05/07/2019   06:21:31   (  -0.00, -75.24) (  -0.40, -73.37)  212.47                80
 05/08/2019   18:43:13   (   0.01, -75.26) (  -0.75, -78.62)  383.16                80
 05/09/2019   18:26:58   (   0.01, -75.27) (   0.28, -74.05)  138.54                80
 05/11/2019   06:48:30   (  -0.02, -75.27) (   0.88, -79.26)  454.56                80
 05/12/2019   06:26:56   (  -0.02, -75.28) (  -0.16, -74.69)   67.41                80
 05/14/2019   18:29:43   (   0.02, -75.33) (   0.04, -75.38)    5.65                80