Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2020   10:53:01   (   0.05,-137.21) (   0.80,-140.49)  374.05                80
 01/29/2020   10:31:26   (   0.05,-137.21) (  -0.23,-135.91)  147.43                80
 01/30/2020   22:55:46   (  -0.05,-137.21) (  -0.92,-141.15)  449.41                80
 01/31/2020   22:34:11   (  -0.05,-137.20) (   0.11,-136.58)   71.79                80
 02/03/2020   10:39:24   (   0.06,-137.19) (   0.08,-137.19)    2.75                80
 02/05/2020   22:42:09   (  -0.07,-137.16) (  -0.20,-137.85)   79.06                80
 02/06/2020   22:20:33   (  -0.07,-137.14) (   0.78,-133.27)  440.90                80
 02/08/2020   10:44:43   (   0.07,-137.11) (   0.39,-138.46)  154.21                80
 02/09/2020   10:23:08   (   0.07,-137.09) (  -0.65,-133.89)  365.21                80