Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2019   22:41:59   (  -0.01,-137.19) (  -0.24,-138.35)  131.21                80
 04/16/2019   22:25:45   (  -0.01,-137.19) (   0.78,-133.78)  389.65                80
 04/18/2019   10:47:17   (   0.01,-137.21) (   0.41,-138.98)  202.60                80
 04/19/2019   10:25:42   (   0.01,-137.20) (  -0.62,-134.42)  317.49                80
 04/20/2019   22:47:23   (  -0.01,-137.17) (  -0.58,-139.65)  283.53                80
 04/21/2019   22:31:08   (  -0.01,-137.17) (   0.45,-135.09)  236.78                80
 04/23/2019   10:52:42   (   0.01,-137.18) (   0.68,-140.31)  355.71                80
 04/24/2019   10:31:06   (   0.01,-137.17) (  -0.29,-135.72)  163.72                80
 04/25/2019   22:52:47   (  -0.01,-137.12) (  -0.85,-140.98)  439.26                80
 04/26/2019   22:36:32   (  -0.01,-137.11) (   0.12,-136.40)   80.45                80