Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/08/2019   22:52:36   (   0.02,-137.18) (  -0.82,-141.03)  438.73                80
 07/09/2019   22:36:21   (   0.02,-137.17) (   0.17,-136.45)   81.80                80
 07/12/2019   10:38:58   (  -0.02,-137.17) (  -0.06,-137.10)    9.46                80
 07/14/2019   22:39:03   (   0.03,-137.13) (  -0.13,-137.76)   72.67                80
 07/15/2019   22:22:49   (   0.03,-137.11) (   0.92,-133.19)  447.01                80
 07/17/2019   10:41:41   (  -0.03,-137.11) (   0.25,-138.40)  146.88                80
 07/18/2019   10:25:26   (  -0.03,-137.10) (  -0.73,-133.82)  372.47                80
 07/19/2019   22:44:26   (   0.03,-137.05) (  -0.43,-139.06)  230.15                80
 07/20/2019   22:28:11   (   0.03,-137.03) (   0.61,-134.50)  289.11                80