Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2021   06:32:04   (  -0.03, -75.23) (  -0.44, -73.35)  214.57                80
 06/11/2021   18:51:01   (   0.03, -75.24) (  -0.69, -78.57)  378.50                80
 06/12/2021   18:34:43   (   0.03, -75.25) (   0.30, -73.97)  145.18                80
 06/14/2021   06:53:30   (  -0.03, -75.25) (   0.85, -79.15)  444.38                80
 06/15/2021   06:37:12   (  -0.03, -75.26) (  -0.19, -74.56)   79.58                80
 06/17/2021   18:39:51   (   0.03, -75.29) (   0.05, -75.18)   11.72                80
 06/20/2021   06:39:41   (  -0.04, -75.31) (   0.05, -75.78)   52.22                80
 06/21/2021   06:23:23   (  -0.03, -75.33) (  -0.94, -71.18)  472.40                80
 06/22/2021   18:42:20   (   0.05, -75.35) (  -0.18, -76.40)  119.21                80
 06/23/2021   18:26:02   (   0.04, -75.37) (   0.86, -71.81)  405.51                80