Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/02/2020   10:52:20   (   0.03,-137.20) (   0.75,-140.33)  357.86                80
 10/03/2020   10:36:04   (   0.04,-137.19) (  -0.28,-135.75)  164.28                80
 10/04/2020   22:55:02   (  -0.03,-137.18) (  -0.91,-140.97)  432.46                80
 10/05/2020   22:38:45   (  -0.04,-137.18) (   0.12,-136.39)   89.23                80
 10/08/2020   10:41:18   (   0.03,-137.16) (  -0.00,-137.00)   18.07                80
 10/10/2020   22:41:20   (  -0.02,-137.12) (  -0.15,-137.65)   59.93                80
 10/11/2020   22:25:04   (  -0.02,-137.11) (   0.88,-133.07)  460.44                80
 10/13/2020   10:43:53   (   0.01,-137.08) (   0.26,-138.26)  133.42                80
 10/14/2020   10:27:36   (   0.01,-137.06) (  -0.77,-133.68)  386.70                80