Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/06/2019   10:52:30   (  -0.02,-137.21) (   0.71,-140.35)  359.01                80
 07/07/2019   10:30:55   (  -0.02,-137.20) (  -0.34,-135.79)  161.67                80
 07/08/2019   22:52:35   (   0.02,-137.18) (  -0.85,-141.03)  438.64                80
 07/09/2019   22:36:21   (   0.02,-137.17) (   0.20,-136.46)   81.94                80
 07/12/2019   10:38:58   (  -0.02,-137.17) (  -0.03,-137.09)    9.28                80
 07/14/2019   22:39:04   (   0.03,-137.13) (  -0.09,-137.77)   72.52                80
 07/15/2019   22:22:48   (   0.02,-137.11) (   0.90,-133.19)  447.22                80
 07/17/2019   10:41:41   (  -0.03,-137.11) (   0.27,-138.40)  146.75                80
 07/18/2019   10:25:26   (  -0.02,-137.10) (  -0.78,-133.83)  372.63                80
 07/19/2019   22:44:25   (   0.03,-137.05) (  -0.44,-139.06)  229.81                80