Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2020   22:29:39   (   0.01,-137.20) (   0.42,-135.32)  213.60                80
 05/02/2020   10:53:50   (  -0.01,-137.20) (   0.76,-140.51)  378.20                80
 05/03/2020   10:32:14   (  -0.01,-137.20) (  -0.29,-135.94)  143.17                80
 05/04/2020   22:56:33   (   0.01,-137.18) (  -0.90,-141.16)  454.36                80
 05/05/2020   22:36:47   (   0.01,-137.17) (   0.16,-136.59)   66.74                30
 05/08/2020   10:40:11   (  -0.01,-137.16) (   0.02,-137.20)    5.76                80
 05/10/2020   22:40:14   (   0.01,-137.11) (  -0.15,-137.85)   84.09                80
 05/11/2020   22:23:57   (   0.00,-137.10) (   0.84,-133.27)  436.12                80
 05/13/2020   10:45:28   (  -0.00,-137.08) (   0.32,-138.46)  157.79                80