Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/25/2020   22:27:02   (   0.02,-137.19) (   0.71,-134.06)  356.48                80
 04/27/2020   10:48:33   (  -0.02,-137.18) (   0.47,-139.25)  236.74                80
 04/28/2020   10:26:57   (  -0.02,-137.17) (  -0.58,-134.68)  283.91                80
 04/29/2020   22:48:35   (   0.01,-137.14) (  -0.61,-139.90)  314.36                80
 04/30/2020   22:32:19   (   0.01,-137.13) (   0.39,-135.32)  205.96                80
 05/02/2020   10:53:50   (  -0.01,-137.11) (   0.74,-140.52)  388.45                80
 05/03/2020   10:32:14   (  -0.01,-137.09) (  -0.26,-135.93)  131.46                80
 05/04/2020   22:53:52   (   0.00,-137.06) (  -0.93,-141.16)  468.01                80
 05/05/2020   22:37:37   (   0.01,-137.04) (   0.13,-136.59)   51.67                80
 05/08/2020   10:40:10   (  -0.01,-136.98) (   0.05,-137.19)   24.58                80