Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/04/2019   10:46:31   (  -0.00,-137.19) (   0.55,-139.63)  279.01                80
 10/05/2019   10:30:16   (  -0.00,-137.18) (  -0.46,-135.06)  241.05                80
 10/06/2019   22:49:17   (   0.01,-137.15) (  -0.68,-140.31)  359.34                80
 10/07/2019   22:33:02   (   0.01,-137.14) (   0.33,-135.73)  160.49                80
 10/09/2019   10:51:53   (  -0.01,-137.13) (   0.82,-140.94)  433.78                80
 10/10/2019   10:35:37   (  -0.01,-137.11) (  -0.18,-136.36)   85.87                80
 10/12/2019   22:38:22   (   0.01,-137.06) (   0.01,-137.02)    4.82                80
 10/15/2019   10:38:18   (  -0.02,-137.02) (   0.14,-137.65)   71.75                80
 10/16/2019   10:22:04   (  -0.02,-137.00) (  -0.92,-133.09)  447.01                80