Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2019   22:23:02   (   0.00,-137.18) (   0.89,-133.14)  459.54                80
 05/04/2019   10:44:34   (  -0.00,-137.18) (   0.28,-138.35)  133.72                80
 05/05/2019   10:23:00   (  -0.00,-137.17) (  -0.76,-133.79)  385.80                80
 05/06/2019   22:44:41   (   0.00,-137.13) (  -0.40,-139.04)  216.25                80
 05/07/2019   22:28:25   (   0.00,-137.12) (   0.58,-134.45)  303.05                80
 05/09/2019   10:49:58   (  -0.00,-137.11) (   0.58,-139.67)  291.33                80
 05/10/2019   10:28:23   (  -0.00,-137.09) (  -0.46,-135.10)  227.08                80
 05/11/2019   22:50:04   (  -0.01,-137.03) (  -0.76,-140.33)  376.97                80
 05/12/2019   22:33:49   (  -0.01,-137.01) (   0.28,-135.77)  141.62                80
 05/14/2019   10:55:21   (   0.02,-137.00) (   0.88,-140.98)  452.92                80
 05/15/2019   10:33:46   (   0.01,-136.97) (  -0.10,-136.40)   64.98                80