Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2020   22:51:16   (   0.01,-137.20) (  -0.58,-139.90)  308.04                80
 04/30/2020   22:29:39   (   0.01,-137.20) (   0.41,-135.32)  213.74                80
 05/02/2020   10:53:51   (  -0.01,-137.20) (   0.71,-140.52)  378.07                80
 05/03/2020   10:32:14   (  -0.01,-137.20) (  -0.28,-135.94)  143.34                80
 05/04/2020   22:56:32   (   0.01,-137.18) (  -0.91,-141.16)  454.08                80
 05/05/2020   22:36:04   (   0.01,-137.18) (   0.14,-136.59)   67.04                13
 05/08/2020   10:37:32   (  -0.01,-137.16) (  -0.02,-137.21)    5.76                80
 05/10/2020   22:40:14   (   0.01,-137.12) (  -0.18,-137.85)   83.61                80
 05/11/2020   22:23:58   (   0.00,-137.10) (   0.88,-133.28)  436.64                80