Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 7.  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   10:41:18   (  -0.02,-137.21) (   0.11,-137.72)   58.17                80
 09/09/2019   10:19:44   (  -0.02,-137.20) (  -0.95,-133.15)  462.63                80
 09/10/2019   22:41:24   (   0.02,-137.19) (  -0.22,-138.39)  136.50                80
 09/11/2019   22:25:09   (   0.01,-137.18) (   0.78,-133.81)  384.21                80
 09/13/2019   10:44:00   (  -0.01,-137.19) (   0.41,-139.02)  208.79                80
 09/14/2019   10:27:45   (  -0.01,-137.18) (  -0.59,-134.44)  311.66                80
 09/15/2019   22:46:45   (   0.01,-137.15) (  -0.58,-139.68)  288.27                80
 09/16/2019   22:30:30   (   0.00,-137.15) (   0.47,-135.11)  231.82                80
 09/18/2019   10:49:22   (  -0.00,-137.14) (   0.70,-140.32)  362.29                80
 09/19/2019   10:33:06   (  -0.00,-137.12) (  -0.30,-135.74)  157.26                80
 09/20/2019   22:52:07   (   0.01,-137.09) (  -0.88,-140.98)  444.30                80