Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/08/2019   10:41:19   (  -0.02,-137.21) (   0.08,-137.72)   57.52                80
 09/09/2019   10:19:43   (  -0.02,-137.21) (  -0.91,-133.14)  463.59                80
 09/10/2019   22:41:24   (   0.01,-137.20) (  -0.26,-138.38)  134.96                80
 09/11/2019   22:25:09   (   0.01,-137.20) (   0.79,-133.82)  386.05                80
 09/13/2019   10:44:01   (  -0.01,-137.21) (   0.39,-139.02)  206.56                80
 09/14/2019   10:27:45   (  -0.00,-137.20) (  -0.61,-134.44)  314.18                80
 09/15/2019   22:46:45   (   0.00,-137.18) (  -0.57,-139.68)  285.22                80
 09/16/2019   22:30:31   (   0.00,-137.18) (   0.49,-135.12)  235.17                80
 09/18/2019   10:49:22   (  -0.00,-137.17) (   0.69,-140.32)  358.55                80
 09/19/2019   10:33:07   (  -0.00,-137.16) (  -0.31,-135.74)  161.30                80