Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 5.  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)   12.13                80
 09/08/2019   10:41:19   (  -0.03,-137.17) (   0.07,-137.73)   62.11                80
 09/09/2019   10:19:44   (  -0.03,-137.16) (  -0.93,-133.15)  457.94                80
 09/10/2019   22:41:24   (   0.03,-137.14) (  -0.25,-138.39)  142.08                80
 09/11/2019   22:25:09   (   0.03,-137.13) (   0.75,-133.81)  377.73                80
 09/13/2019   10:46:41   (  -0.03,-137.12) (   0.38,-139.02)  216.89                80
 09/14/2019   10:25:05   (  -0.03,-137.10) (  -0.62,-134.45)  302.71                80
 09/15/2019   22:46:46   (   0.03,-137.07) (  -0.56,-139.69)  298.12                80
 09/16/2019   22:30:31   (   0.03,-137.06) (   0.49,-135.12)  221.16                80
 09/18/2019   10:49:23   (  -0.03,-137.03) (   0.69,-140.32)  374.51                80