Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 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)
 06/08/2019   22:22:57   (  -0.01,-137.18) (   0.88,-133.18)  455.73                80
 06/10/2019   10:44:30   (   0.01,-137.20) (   0.25,-138.39)  135.58                80
 06/11/2019   10:22:54   (   0.02,-137.19) (  -0.73,-133.81)  384.80                80
 06/12/2019   22:44:36   (  -0.01,-137.15) (  -0.44,-139.06)  217.11                80
 06/13/2019   22:28:21   (  -0.01,-137.15) (   0.61,-134.49)  303.03                80
 06/15/2019   10:49:52   (  -0.00,-137.16) (   0.58,-139.69)  289.26                80
 06/16/2019   10:28:18   (  -0.00,-137.15) (  -0.46,-135.13)  230.30                80
 06/17/2019   22:49:59   (   0.01,-137.10) (  -0.70,-140.38)  373.03                80
 06/18/2019   22:33:44   (   0.00,-137.08) (   0.29,-135.80)  146.51                80
 06/20/2019   10:52:36   (  -0.00,-137.09) (   0.85,-141.01)  446.28                80
 06/21/2019   10:36:21   (   0.00,-137.07) (  -0.13,-136.43)   72.87                80