Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2019   10:44:35   (   0.00,-137.18) (   0.24,-138.36)  133.71                80
 05/05/2019   10:22:59   (   0.00,-137.17) (  -0.73,-133.78)  385.81                80
 05/06/2019   22:44:40   (  -0.00,-137.13) (  -0.42,-139.03)  216.31                80
 05/07/2019   22:28:26   (  -0.00,-137.12) (   0.62,-134.46)  302.96                80
 05/09/2019   10:49:58   (  -0.00,-137.11) (   0.54,-139.67)  291.46                80
 05/10/2019   10:28:23   (  -0.00,-137.09) (  -0.44,-135.09)  226.90                80
 05/11/2019   22:50:04   (  -0.00,-137.03) (  -0.72,-140.34)  377.39                80
 05/12/2019   22:33:49   (  -0.00,-137.00) (   0.26,-135.76)  141.13                80
 05/14/2019   10:55:21   (   0.01,-136.99) (   0.89,-140.97)  453.41                80
 05/15/2019   10:33:46   (   0.00,-136.97) (  -0.15,-136.41)   64.52                80