Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2019   10:36:30   (   0.00,-137.21) (  -0.02,-137.04)   18.49                80
 05/01/2019   22:39:17   (  -0.00,-137.18) (  -0.10,-137.72)   61.26                80
 05/02/2019   22:23:02   (  -0.00,-137.18) (   0.88,-133.14)  459.24                80
 05/04/2019   10:44:35   (   0.00,-137.18) (   0.23,-138.36)  133.92                80
 05/05/2019   10:22:59   (   0.00,-137.17) (  -0.74,-133.78)  385.62                80
 05/06/2019   22:44:41   (   0.00,-137.13) (  -0.41,-139.03)  216.62                80
 05/07/2019   22:28:25   (   0.00,-137.12) (   0.57,-134.45)  302.65                80
 05/09/2019   10:49:59   (  -0.01,-137.11) (   0.54,-139.68)  291.69                80
 05/10/2019   10:28:23   (  -0.01,-137.09) (  -0.44,-135.10)  226.59                80