Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2019   10:55:22   (   0.01,-137.21) (   0.85,-140.98)  429.21                80
 05/15/2019   10:33:47   (   0.01,-137.21) (  -0.19,-136.41)   91.48                80
 05/17/2019   22:39:13   (  -0.01,-137.18) (   0.00,-137.08)   10.89                80
 05/20/2019   10:41:51   (   0.00,-137.20) (   0.10,-137.73)   60.05                80
 05/21/2019   10:20:16   (   0.00,-137.19) (  -0.88,-133.15)  459.82                80
 05/22/2019   22:41:57   (   0.00,-137.14) (  -0.28,-138.40)  143.16                80
 05/23/2019   22:25:42   (   0.00,-137.13) (   0.76,-133.83)  376.66                80
 05/25/2019   10:47:14   (  -0.01,-137.15) (   0.43,-139.03)  215.13                80
 05/26/2019   10:25:39   (  -0.01,-137.13) (  -0.61,-134.46)  304.16                80
 05/27/2019   22:47:20   (   0.01,-137.07) (  -0.55,-139.71)  300.07                80