Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 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)
 07/05/2020   10:41:24   (   0.01,-137.18) (   0.07,-137.33)   17.58                80
 07/07/2020   22:41:26   (  -0.01,-137.15) (  -0.20,-137.98)   94.34                80
 07/08/2020   22:25:10   (  -0.01,-137.14) (   0.82,-133.40)  426.61                80
 07/10/2020   10:46:39   (   0.02,-137.13) (   0.38,-138.58)  166.53                80
 07/11/2020   10:25:04   (   0.02,-137.11) (  -0.69,-134.01)  354.10                80
 07/12/2020   22:46:42   (  -0.02,-137.09) (  -0.49,-139.23)  244.38                80
 07/13/2020   22:30:26   (  -0.02,-137.07) (   0.52,-134.65)  275.89                80
 07/15/2020   10:51:56   (   0.01,-137.05) (   0.62,-139.85)  318.63                80
 07/16/2020   10:30:19   (  -0.01,-137.03) (  -0.39,-135.26)  200.84                80
 07/17/2020   22:51:58   (   0.01,-136.99) (  -0.78,-140.49)  399.31                80
 07/18/2020   22:35:41   (   0.01,-136.96) (   0.23,-135.91)  120.04                80