Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/06/2020   22:31:25   (   0.00,-137.17) (   0.48,-135.00)  247.14                80
 06/08/2020   10:52:55   (  -0.01,-137.16) (   0.69,-140.19)  345.99                80
 06/09/2020   10:31:19   (  -0.01,-137.15) (  -0.37,-135.62)  174.78                80
 06/10/2020   22:52:58   (   0.01,-137.13) (  -0.85,-140.84)  423.25                80
 06/11/2020   22:36:42   (   0.01,-137.12) (   0.21,-136.27)   97.52                80
 06/13/2020   10:58:11   (  -0.00,-137.10) (   0.97,-141.46)  495.86                80
 06/14/2020   10:36:35   (  -0.00,-137.09) (  -0.04,-136.87)   24.61                80
 06/16/2020   22:39:18   (   0.00,-137.05) (  -0.12,-137.52)   54.15                80
 06/17/2020   22:23:02   (   0.00,-137.03) (   0.95,-132.95)  465.90                80
 06/19/2020   10:44:32   (   0.00,-137.00) (   0.23,-138.14)  128.90                80