Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/09/2019   22:47:01   (   0.04,-137.20) (  -0.52,-139.72)  287.61                80
 08/10/2019   22:30:46   (   0.04,-137.19) (   0.47,-135.14)  233.04                80
 08/12/2019   10:49:39   (  -0.05,-137.20) (   0.64,-140.36)  360.51                80
 08/13/2019   10:33:24   (  -0.05,-137.19) (  -0.35,-135.78)  159.79                80
 08/14/2019   22:52:24   (   0.06,-137.17) (  -0.80,-141.03)  440.03                80
 08/15/2019   22:36:09   (   0.06,-137.16) (   0.19,-136.45)   80.17                80
 08/18/2019   10:38:46   (  -0.06,-137.14) (  -0.07,-137.09)    6.00                80
 08/20/2019   22:38:51   (   0.06,-137.10) (  -0.08,-137.76)   75.03                80
 08/21/2019   22:22:36   (   0.06,-137.08) (   0.91,-133.18)  444.36                80