Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2019   06:31:38   (  -0.02, -75.19) (  -0.02, -75.33)   14.55                80
 09/23/2019   18:31:43   (   0.02, -75.21) (  -0.17, -75.99)   89.16                80
 09/24/2019   18:15:29   (   0.02, -75.21) (   0.89, -71.42)  432.32                80
 09/26/2019   06:37:00   (  -0.01, -75.21) (   0.28, -76.63)  161.16                80
 09/27/2019   06:15:24   (  -0.01, -75.21) (  -0.73, -72.05)  360.70                80
 09/28/2019   18:37:05   (   0.01, -75.23) (  -0.47, -77.29)  234.34                80
 09/29/2019   18:20:50   (   0.00, -75.24) (   0.59, -72.72)  288.02                80
 10/01/2019   06:42:22   (  -0.00, -75.25) (   0.57, -77.93)  304.11                80
 10/02/2019   06:20:46   (  -0.00, -75.27) (  -0.44, -73.35)  218.44                80
 10/03/2019   18:42:26   (  -0.00, -75.29) (  -0.75, -78.59)  375.76                80
 10/04/2019   18:26:11   (  -0.02, -75.31) (   0.25, -74.01)  147.55                80