Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2020   22:29:15   (   0.01,-137.18) (   0.58,-134.53)  301.77                80
 05/18/2020   10:50:45   (  -0.00,-137.17) (   0.56,-139.73)  291.74                80
 05/19/2020   10:29:08   (  -0.01,-137.16) (  -0.44,-135.14)  229.13                80
 05/20/2020   22:50:48   (   0.00,-137.15) (  -0.71,-140.38)  368.13                80
 05/21/2020   22:34:31   (   0.01,-137.13) (   0.29,-135.79)  152.38                80
 05/23/2020   10:56:01   (  -0.01,-137.11) (   0.85,-140.99)  442.38                80
 05/24/2020   10:34:25   (  -0.01,-137.09) (  -0.15,-136.41)   77.48                80
 05/26/2020   22:37:08   (   0.00,-137.04) (   0.01,-137.06)    2.25                80
 05/29/2020   10:42:21   (   0.00,-136.97) (   0.18,-137.66)   79.24                80
 05/30/2020   10:20:45   (   0.00,-136.94) (  -0.88,-133.09)  439.77                80