Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/15/2019   10:49:53   (  -0.02,-137.22) (   0.51,-139.71)  283.06                80
 06/16/2019   10:28:18   (  -0.02,-137.21) (  -0.47,-135.13)  237.59                80
 06/17/2019   22:49:59   (   0.03,-137.18) (  -0.69,-140.37)  363.68                80
 06/18/2019   22:33:45   (   0.03,-137.18) (   0.36,-135.81)  156.96                80
 06/20/2019   10:55:16   (  -0.03,-137.20) (   0.83,-141.01)  434.25                80
 06/21/2019   10:33:41   (  -0.03,-137.19) (  -0.22,-136.44)   85.93                80
 06/23/2019   22:39:07   (   0.04,-137.14) (   0.06,-137.11)    4.11                80
 06/26/2019   10:41:44   (  -0.04,-137.15) (   0.09,-137.75)   68.20                80
 06/27/2019   10:20:09   (  -0.04,-137.13) (  -0.90,-133.17)  451.28                80