Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/05/2019   22:38:42   (   0.02,-137.19) (   0.07,-137.09)   12.18                80
 09/08/2019   10:41:19   (  -0.03,-137.18) (   0.07,-137.72)   61.87                80
 09/09/2019   10:19:44   (  -0.03,-137.17) (  -0.92,-133.15)  458.21                80
 09/10/2019   22:41:24   (   0.03,-137.15) (  -0.25,-138.39)  141.55                80
 09/11/2019   22:25:09   (   0.03,-137.13) (   0.74,-133.81)  378.33                80
 09/13/2019   10:46:41   (  -0.03,-137.12) (   0.39,-139.02)  216.33                80
 09/14/2019   10:27:45   (  -0.03,-137.11) (  -0.61,-134.45)  303.33                80
 09/15/2019   22:46:46   (   0.02,-137.08) (  -0.58,-139.68)  297.26                80
 09/16/2019   22:30:31   (   0.02,-137.06) (   0.48,-135.12)  222.07                80