Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 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)
 10/04/2019   10:49:11   (  -0.01,-137.19) (   0.54,-139.63)  278.86                80
 10/05/2019   10:27:36   (  -0.01,-137.18) (  -0.46,-135.06)  241.53                80
 10/06/2019   22:51:57   (   0.01,-137.16) (  -0.67,-140.31)  358.49                80
 10/07/2019   22:30:22   (   0.01,-137.15) (   0.33,-135.73)  161.45                80
 10/09/2019   10:54:33   (  -0.02,-137.14) (   0.82,-140.94)  432.57                80
 10/10/2019   10:35:38   (  -0.02,-137.13) (  -0.18,-136.36)   87.13                80
 10/12/2019   22:38:22   (   0.01,-137.08) (   0.00,-137.02)    6.68                80
 10/15/2019   10:38:18   (   0.02,-137.05) (   0.15,-137.65)   68.54                80
 10/16/2019   10:22:03   (   0.03,-137.02) (  -0.86,-133.07)  450.47                80
 10/17/2019   22:41:03   (  -0.03,-136.98) (  -0.32,-138.31)  151.77                80