Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/26/2019   22:36:33   (   0.00,-137.19) (   0.18,-136.40)   90.00                80
 04/29/2019   10:36:31   (  -0.00,-137.21) (  -0.03,-137.04)   18.25                80
 05/01/2019   22:39:16   (   0.00,-137.18) (  -0.15,-137.71)   61.50                80
 05/02/2019   22:23:02   (   0.01,-137.18) (   0.89,-133.15)  458.94                80
 05/04/2019   10:44:35   (  -0.01,-137.18) (   0.23,-138.37)  134.24                80
 05/05/2019   10:23:00   (  -0.01,-137.17) (  -0.75,-133.79)  385.14                80
 05/06/2019   22:44:41   (   0.02,-137.13) (  -0.41,-139.04)  217.31                80
 05/07/2019   22:28:27   (   0.02,-137.12) (   0.62,-134.47)  301.95                80
 05/09/2019   10:49:59   (  -0.02,-137.11) (   0.54,-139.68)  292.22                80