Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2020   22:53:53   (   0.01,-137.20) (  -0.85,-141.17)  452.60                80
 05/05/2020   22:37:37   (   0.01,-137.20) (   0.14,-136.59)   69.11                80
 05/08/2020   10:37:32   (  -0.01,-137.19) (  -0.03,-137.21)    2.95                80
 05/10/2020   22:40:13   (   0.01,-137.16) (  -0.17,-137.85)   78.63                80
 05/11/2020   22:23:58   (   0.01,-137.15) (   0.89,-133.28)  442.23                80
 05/13/2020   10:45:28   (  -0.00,-137.14) (   0.27,-138.47)  150.99                80
 05/14/2020   10:23:52   (  -0.00,-137.13) (  -0.72,-133.89)  369.60                80
 05/15/2020   22:45:30   (   0.00,-137.11) (  -0.47,-139.11)  229.06                80
 05/16/2020   22:29:15   (   0.00,-137.09) (   0.59,-134.54)  291.44                80