Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2020   10:53:50   (  -0.01,-137.20) (   0.76,-140.51)  378.00                80
 05/03/2020   10:32:14   (  -0.01,-137.20) (  -0.30,-135.94)  143.43                80
 05/04/2020   22:53:53   (   0.01,-137.18) (  -0.89,-141.17)  453.97                80
 05/05/2020   22:37:37   (   0.01,-137.18) (   0.17,-136.59)   67.25                80
 05/08/2020   10:40:11   (  -0.01,-137.16) (   0.01,-137.20)    4.81                80
 05/10/2020   22:40:14   (   0.01,-137.12) (  -0.14,-137.85)   83.28                80
 05/11/2020   22:23:57   (   0.00,-137.10) (   0.86,-133.27)  437.04                80
 05/13/2020   10:45:28   (  -0.00,-137.09) (   0.30,-138.46)  156.74                80
 05/14/2020   10:23:51   (   0.00,-137.07) (  -0.70,-133.88)  363.34                80