Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/05/2021   18:52:29   (   0.09, -75.21) (  -0.42, -77.42)  252.01                80
 10/06/2021   18:30:51   (   0.09, -75.22) (   0.65, -72.84)  272.22                80
 10/08/2021   06:54:57   (  -0.08, -75.23) (   0.52, -78.01)  316.11                80
 10/09/2021   06:33:19   (  -0.09, -75.24) (  -0.50, -73.41)  208.04                80
 10/10/2021   18:57:34   (   0.08, -75.25) (  -0.69, -78.62)  383.37                80
 10/11/2021   18:35:56   (   0.08, -75.26) (   0.33, -74.02)  140.98                80
 10/13/2021   07:00:02   (  -0.07, -75.28) (   0.83, -79.19)  446.72                80
 10/14/2021   06:38:25   (  -0.08, -75.29) (  -0.25, -74.61)   77.77                80
 10/16/2021   18:43:41   (   0.08, -75.33) (   0.09, -75.22)   12.74                80