Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/09/2019   10:54:33   (  -0.02,-137.21) (   0.84,-140.93)  424.79                80
 10/10/2019   10:35:38   (  -0.02,-137.21) (  -0.23,-136.37)   96.26                80
 10/12/2019   22:38:23   (   0.02,-137.19) (   0.04,-137.03)   18.36                80
 10/15/2019   10:38:19   (   0.00,-137.18) (   0.10,-137.66)   53.88                80
 10/16/2019   10:22:03   (   0.03,-137.17) (  -0.91,-133.08)  466.76                80
 10/17/2019   22:43:44   (  -0.02,-137.14) (  -0.27,-138.32)  133.73                80
 10/18/2019   22:22:08   (  -0.02,-137.13) (   0.74,-133.74)  385.72                80
 10/20/2019   10:46:19   (   0.02,-137.11) (   0.42,-138.95)  209.38                80
 10/21/2019   10:24:44   (   0.01,-137.09) (  -0.59,-134.37)  309.52                80