Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 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)
 06/15/2021   06:37:13   (  -0.03, -75.26) (  -0.20, -74.56)   79.84                80
 06/17/2021   18:39:51   (   0.03, -75.29) (   0.06, -75.18)   12.17                80
 06/20/2021   06:39:41   (  -0.04, -75.32) (   0.04, -75.78)   51.50                80
 06/21/2021   06:23:23   (  -0.03, -75.33) (  -0.95, -71.18)  473.22                80
 06/22/2021   18:42:20   (   0.05, -75.36) (  -0.18, -76.40)  118.30                80
 06/23/2021   18:26:03   (   0.04, -75.37) (   0.86, -71.81)  406.50                80
 06/25/2021   06:44:50   (  -0.06, -75.40) (   0.28, -76.99)  181.26                80
 06/26/2021   06:28:31   (  -0.05, -75.41) (  -0.70, -72.39)  343.86                80
 06/27/2021   18:47:29   (   0.06, -75.45) (  -0.42, -77.61)  246.74                80
 06/28/2021   18:31:11   (   0.06, -75.47) (   0.63, -73.03)  279.06                80