Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/06/2021   11:05:22   (   0.02,-137.21) (   0.85,-140.98)  429.05                80
 11/07/2021   10:49:04   (   0.02,-137.20) (  -0.18,-136.38)   94.00                80
 11/09/2021   22:51:41   (  -0.01,-137.18) (   0.04,-136.99)   21.52                80
 11/12/2021   10:51:28   (   0.01,-137.16) (   0.11,-137.56)   46.13                80
 11/13/2021   10:35:09   (   0.01,-137.15) (  -0.92,-132.97)  476.42                80
 11/14/2021   22:54:05   (  -0.01,-137.13) (  -0.24,-138.17)  119.01                80
 11/15/2021   22:37:46   (  -0.01,-137.12) (   0.80,-133.58)  403.44                80
 11/17/2021   10:56:31   (   0.01,-137.10) (   0.39,-138.74)  187.18                80
 11/18/2021   10:40:13   (   0.01,-137.09) (  -0.65,-134.15)  334.86                80