Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/10/2019   22:30:46   (   0.04,-137.19) (   0.47,-135.14)  233.02                80
 08/12/2019   10:52:19   (  -0.05,-137.19) (   0.64,-140.36)  360.78                80
 08/13/2019   10:30:44   (  -0.05,-137.18) (  -0.35,-135.78)  159.37                80
 08/14/2019   22:52:24   (   0.05,-137.16) (  -0.80,-141.03)  440.56                80
 08/15/2019   22:36:08   (   0.05,-137.15) (   0.20,-136.45)   79.48                80
 08/18/2019   10:38:46   (  -0.06,-137.13) (  -0.08,-137.09)    5.26                80
 08/20/2019   22:38:51   (   0.06,-137.09) (  -0.07,-137.76)   76.35                80
 08/21/2019   22:22:36   (   0.06,-137.07) (   0.92,-133.18)  442.94                80
 08/23/2019   10:41:28   (  -0.06,-137.05) (   0.24,-138.39)  152.74                80