Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2019   10:41:51   (  -0.01,-137.21) (   0.11,-137.72)   58.82                80
 05/21/2019   10:20:16   (  -0.02,-137.21) (  -0.93,-133.16)  461.60                80
 05/22/2019   22:41:58   (   0.02,-137.18) (  -0.23,-138.40)  139.22                80
 05/23/2019   22:25:42   (   0.01,-137.18) (   0.75,-133.82)  381.57                80
 05/25/2019   10:47:14   (  -0.01,-137.19) (   0.38,-139.04)  209.85                80
 05/26/2019   10:25:39   (  -0.00,-137.19) (  -0.60,-134.46)  310.34                80
 05/27/2019   22:47:20   (   0.01,-137.15) (  -0.56,-139.71)  291.90                80
 05/28/2019   22:31:06   (   0.00,-137.14) (   0.48,-135.14)  228.31                80
 05/30/2019   10:52:37   (  -0.01,-137.15) (   0.71,-140.34)  363.61                80
 05/31/2019   10:31:03   (  -0.01,-137.14) (  -0.34,-135.78)  155.82                80
 06/01/2019   22:52:43   (   0.02,-137.08) (  -0.88,-141.01)  448.38                80