Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/07/2021   10:49:04   (   0.02,-137.21) (  -0.17,-136.38)   94.18                80
 11/09/2021   22:51:41   (  -0.01,-137.18) (   0.01,-136.99)   21.65                80
 11/12/2021   10:51:29   (   0.01,-137.16) (   0.11,-137.56)   46.05                80
 11/13/2021   10:35:10   (   0.01,-137.15) (  -0.91,-132.97)  476.44                80
 11/14/2021   22:54:07   (  -0.01,-137.13) (  -0.22,-138.18)  119.23                80
 11/15/2021   22:37:48   (  -0.01,-137.12) (   0.80,-133.59)  403.14                80
 11/17/2021   10:56:34   (   0.01,-137.11) (   0.36,-138.75)  187.55                80
 11/18/2021   10:40:16   (   0.01,-137.09) (  -0.65,-134.16)  334.37                80
 11/19/2021   22:59:11   (  -0.01,-137.06) (  -0.53,-139.36)  262.39                80
 11/20/2021   22:42:53   (  -0.01,-137.04) (   0.49,-134.77)  259.02                80