Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2019   22:50:05   (  -0.00,-137.18) (  -0.70,-140.34)  360.27                80
 05/12/2019   22:33:50   (  -0.00,-137.18) (   0.33,-135.78)  160.90                80
 05/14/2019   10:55:23   (   0.00,-137.21) (   0.82,-140.99)  429.54                80
 05/15/2019   10:33:47   (   0.00,-137.21) (  -0.16,-136.41)   91.14                80
 05/17/2019   22:39:14   (   0.00,-137.18) (   0.02,-137.09)   10.23                80
 05/20/2019   10:41:52   (  -0.01,-137.19) (   0.09,-137.73)   60.86                80
 05/21/2019   10:20:16   (  -0.01,-137.18) (  -0.89,-133.15)  458.87                80
 05/22/2019   22:41:58   (   0.02,-137.14) (  -0.28,-138.40)  144.30                80
 05/23/2019   22:25:43   (   0.02,-137.13) (   0.75,-133.83)  375.49                80