Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/27/2021   18:34:53   (   0.02, -75.22) (   0.52, -72.98)  255.38                80
 10/29/2021   06:56:18   (  -0.01, -75.22) (   0.68, -78.14)  333.35                80
 10/30/2021   06:34:40   (  -0.02, -75.23) (  -0.41, -73.56)  190.78                80
 10/31/2021   18:58:56   (   0.01, -75.25) (  -0.78, -78.76)  400.21                80
 11/01/2021   18:39:37   (   0.02, -75.26) (   0.24, -74.17)  124.56                60
 11/03/2021   07:01:23   (  -0.01, -75.28) (   0.90, -79.34)  462.66                80
 11/04/2021   06:39:45   (  -0.01, -75.29) (  -0.13, -74.74)   62.15                80
 11/06/2021   18:45:02   (  -0.01, -75.33) (  -0.03, -75.35)    3.46                80
 11/09/2021   06:47:30   (   0.01, -75.36) (   0.15, -75.93)   64.98                80