Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 3 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)
 03/01/2021   06:47:48   (  -0.03, -75.20) (   0.55, -77.81)  297.13                80
 03/02/2021   06:26:11   (  -0.03, -75.21) (  -0.46, -73.22)  225.94                80
 03/03/2021   18:47:48   (   0.03, -75.21) (  -0.72, -78.44)  368.04                80
 03/04/2021   18:31:31   (   0.03, -75.22) (   0.36, -73.86)  155.48                80
 03/06/2021   06:52:59   (  -0.03, -75.23) (   0.84, -79.03)  433.35                80
 03/07/2021   06:31:22   (  -0.03, -75.24) (  -0.23, -74.45)   90.13                80
 03/09/2021   18:36:41   (   0.00, -75.26) (   0.02, -75.07)   21.33                80
 03/12/2021   06:39:13   (   0.00, -75.31) (   0.06, -75.68)   41.66                80
 03/13/2021   06:17:35   (   0.00, -75.32) (  -0.95, -71.09)  482.99                80
 03/14/2021   18:39:13   (  -0.00, -75.35) (  -0.20, -76.30)  108.76                80