Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 9.  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   (  -0.00,-137.21) (   0.81,-140.94)  424.38                80
 10/10/2019   10:32:58   (  -0.00,-137.21) (  -0.20,-136.36)   96.62                80
 10/12/2019   22:38:22   (   0.00,-137.19) (   0.02,-137.02)   18.74                80
 10/15/2019   10:38:18   (  -0.00,-137.18) (   0.12,-137.65)   54.32                80
 10/16/2019   10:22:03   (   0.00,-137.17) (  -0.89,-133.07)  465.83                80
 10/17/2019   22:41:03   (  -0.00,-137.14) (  -0.29,-138.31)  134.45                80
 10/18/2019   22:24:48   (  -0.01,-137.12) (   0.72,-133.74)  385.24                80
 10/20/2019   10:43:39   (   0.02,-137.10) (   0.43,-138.94)  209.86                80
 10/21/2019   10:27:24   (   0.02,-137.08) (  -0.58,-134.37)  309.10                80
 10/22/2019   22:46:24   (  -0.02,-137.04) (  -0.59,-139.61)  292.75                80