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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/06/2021   18:30:51   (   0.08, -75.22) (   0.64, -72.84)  272.37                80
 10/08/2021   06:54:57   (  -0.07, -75.23) (   0.53, -78.00)  315.83                80
 10/09/2021   06:33:19   (  -0.08, -75.24) (  -0.48, -73.41)  208.34                80
 10/10/2021   18:57:34   (   0.07, -75.26) (  -0.70, -78.61)  383.14                80
 10/11/2021   18:35:56   (   0.08, -75.27) (   0.37, -74.03)  141.22                80
 10/13/2021   07:00:03   (  -0.07, -75.28) (   0.79, -79.20)  446.35                80
 10/14/2021   06:38:24   (  -0.08, -75.29) (  -0.23, -74.61)   78.15                80
 10/16/2021   18:41:02   (   0.08, -75.34) (   0.12, -75.23)   13.05                80
 10/19/2021   06:46:10   (  -0.07, -75.39) (   0.02, -75.80)   46.85                80