Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 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)
 07/03/2019   22:47:13   (   0.02,-137.19) (  -0.52,-139.73)  288.05                80
 07/04/2019   22:30:58   (   0.01,-137.19) (   0.47,-135.15)  232.88                80
 07/06/2019   10:49:50   (  -0.01,-137.20) (   0.68,-140.36)  359.40                80
 07/07/2019   10:33:35   (  -0.01,-137.20) (  -0.30,-135.78)  161.22                80
 07/08/2019   22:52:36   (   0.01,-137.17) (  -0.83,-141.03)  439.11                80
 07/09/2019   22:36:21   (   0.01,-137.17) (   0.16,-136.45)   81.33                80
 07/12/2019   10:38:58   (  -0.01,-137.16) (  -0.05,-137.10)    8.45                80
 07/14/2019   22:39:03   (   0.02,-137.12) (  -0.14,-137.76)   73.68                80
 07/15/2019   22:22:49   (   0.02,-137.10) (   0.91,-133.19)  445.90                80