Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2019 9 20.  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   (  -0.00, -75.20) (   0.01, -75.32)   13.20                80
 09/23/2019   18:31:44   (   0.01, -75.22) (  -0.14, -75.99)   87.41                80
 09/24/2019   18:15:28   (   0.01, -75.23) (   0.86, -71.42)  434.35                80
 09/26/2019   06:37:00   (  -0.01, -75.23) (   0.31, -76.62)  158.66                80
 09/27/2019   06:15:25   (  -0.01, -75.24) (  -0.75, -72.06)  363.44                80
 09/28/2019   18:37:05   (   0.01, -75.26) (  -0.44, -77.29)  231.21                80
 09/29/2019   18:20:50   (   0.01, -75.28) (   0.56, -72.72)  291.45                80
 10/01/2019   06:42:21   (  -0.01, -75.29) (   0.60, -77.92)  300.14                80
 10/02/2019   06:20:47   (  -0.01, -75.31) (  -0.46, -73.36)  222.63                80
 10/03/2019   18:42:27   (   0.02, -75.34) (  -0.74, -78.59)  371.40                80