Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/12/2021   10:51:28   (   0.01,-137.20) (   0.11,-137.56)   41.53                80
 11/13/2021   10:35:10   (   0.01,-137.20) (  -0.92,-132.97)  481.89                80
 11/14/2021   22:54:05   (  -0.01,-137.19) (  -0.25,-138.17)  112.62                80
 11/15/2021   22:37:46   (  -0.01,-137.18) (   0.79,-133.58)  410.66                80
 11/17/2021   10:56:33   (   0.01,-137.18) (   0.35,-138.75)  178.51                80
 11/18/2021   10:40:14   (   0.01,-137.18) (  -0.68,-134.16)  344.35                80
 11/19/2021   22:59:09   (  -0.01,-137.15) (  -0.53,-139.35)  251.15                80
 11/20/2021   22:42:50   (  -0.01,-137.14) (   0.51,-134.76)  271.23                80
 11/22/2021   11:01:36   (   0.01,-137.13) (   0.63,-139.93)  319.46                80
 11/23/2021   10:45:18   (   0.01,-137.11) (  -0.41,-135.34)  202.38                80