Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/26/2020   22:37:09   (   0.01,-137.18) (   0.06,-137.07)   14.27                80
 05/29/2020   10:42:22   (  -0.00,-137.16) (   0.13,-137.67)   58.36                80
 05/30/2020   10:20:46   (  -0.00,-137.15) (  -0.93,-133.10)  462.39                80
 05/31/2020   22:42:25   (   0.00,-137.13) (  -0.29,-138.32)  135.94                80
 06/01/2020   22:26:09   (   0.00,-137.12) (   0.77,-133.75)  384.52                80
 06/03/2020   10:44:59   (  -0.00,-137.10) (   0.42,-138.93)  209.64                80
 06/04/2020   10:28:43   (   0.00,-137.08) (  -0.63,-134.36)  310.39                80
 06/05/2020   22:47:41   (  -0.01,-137.04) (  -0.59,-139.58)  289.15                80
 06/06/2020   22:31:25   (  -0.01,-137.02) (   0.41,-134.99)  230.55                80