Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2021   06:53:30   (  -0.03, -75.25) (   0.87, -79.14)  444.25                80
 06/15/2021   06:37:12   (  -0.03, -75.26) (  -0.18, -74.56)   79.76                80
 06/17/2021   18:39:51   (   0.03, -75.29) (   0.03, -75.18)   12.38                80
 06/20/2021   06:39:41   (  -0.04, -75.32) (   0.07, -75.77)   51.71                80
 06/21/2021   06:23:23   (  -0.03, -75.33) (  -0.97, -71.18)  472.89                80
 06/22/2021   18:42:20   (   0.04, -75.36) (  -0.21, -76.39)  118.64                80
 06/23/2021   18:26:02   (   0.04, -75.37) (   0.83, -71.81)  406.14                80
 06/25/2021   06:44:49   (  -0.05, -75.39) (   0.32, -76.98)  181.76                80
 06/26/2021   06:28:32   (  -0.05, -75.41) (  -0.73, -72.40)  343.29                80