Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/12/2019   10:36:18   (  -0.02,-137.21) (  -0.03,-137.09)   12.83                80
 07/14/2019   22:39:04   (   0.02,-137.19) (  -0.10,-137.77)   66.07                80
 07/15/2019   22:22:49   (   0.02,-137.18) (   0.94,-133.20)  454.74                80
 07/17/2019   10:41:42   (  -0.03,-137.20) (   0.23,-138.41)  137.52                80
 07/18/2019   10:25:26   (  -0.03,-137.19) (  -0.76,-133.83)  382.98                80
 07/19/2019   22:44:26   (   0.03,-137.16) (  -0.41,-139.07)  217.68                80
 07/20/2019   22:28:12   (   0.03,-137.16) (   0.64,-134.50)  302.73                80
 07/22/2019   10:47:04   (  -0.03,-137.17) (   0.54,-139.71)  290.17                80
 07/23/2019   10:30:50   (  -0.03,-137.16) (  -0.50,-135.14)  229.84                80