Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2020   10:21:55   (   0.03,-137.19) (  -0.84,-133.19)  455.35                80
 07/28/2020   22:43:33   (  -0.02,-137.18) (  -0.32,-138.42)  141.69                80
 07/29/2020   22:27:18   (  -0.02,-137.17) (   0.75,-133.85)  379.39                80
 07/31/2020   10:48:48   (  -0.02,-137.16) (   0.41,-139.05)  214.76                80
 08/01/2020   10:27:11   (  -0.01,-137.15) (  -0.60,-134.46)  306.05                80
 08/02/2020   22:48:50   (   0.01,-137.13) (  -0.55,-139.69)  291.94                80
 08/03/2020   22:32:33   (   0.01,-137.11) (   0.46,-135.11)  228.72                80
 08/05/2020   10:54:04   (  -0.01,-137.10) (   0.71,-140.30)  365.07                80
 08/06/2020   10:35:07   (  -0.01,-137.08) (  -0.31,-135.72)  155.38                80
 08/07/2020   22:54:05   (   0.01,-137.05) (  -0.84,-140.95)  443.16                80
 08/08/2020   22:37:49   (   0.01,-137.04) (   0.17,-136.36)   77.12                80