Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 9 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2019   06:23:36   (   0.00, -75.19) (  -0.27, -74.02)  134.19                80
 09/17/2019   18:45:16   (  -0.00, -75.20) (  -0.91, -79.26)  462.24                80
 09/18/2019   18:29:01   (  -0.00, -75.21) (   0.09, -74.68)   59.45                80
 09/21/2019   06:31:38   (   0.00, -75.22) (   0.02, -75.32)   11.70                80
 09/23/2019   18:31:44   (  -0.00, -75.23) (  -0.16, -75.99)   86.20                80
 09/24/2019   18:15:28   (  -0.00, -75.24) (   0.85, -71.42)  435.76                80
 09/26/2019   06:36:59   (   0.01, -75.25) (   0.32, -76.62)  156.12                80
 09/27/2019   06:15:25   (   0.01, -75.26) (  -0.74, -72.06)  366.11                80
 09/28/2019   18:37:05   (  -0.01, -75.28) (  -0.45, -77.29)  229.06                80
 09/29/2019   18:20:50   (  -0.01, -75.30) (   0.55, -72.72)  293.68                80