Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 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)
 04/16/2020   10:56:55   (  -0.02,-137.17) (   0.88,-141.30)  470.53                80
 04/17/2020   10:35:18   (  -0.02,-137.16) (  -0.11,-136.72)   50.41                80
 04/19/2020   22:38:01   (   0.01,-137.14) (  -0.02,-137.37)   25.55                80
 04/20/2020   22:21:45   (   0.01,-137.13) (   0.98,-132.79)  495.30                80
 04/22/2020   10:43:16   (  -0.01,-137.11) (   0.16,-137.99)   99.34                80
 04/23/2020   10:21:39   (  -0.02,-137.10) (  -0.84,-133.41)  420.89                80
 04/24/2020   22:43:18   (   0.01,-137.08) (  -0.34,-138.63)  177.32                80
 04/25/2020   22:27:02   (   0.01,-137.06) (   0.72,-134.06)  342.55                80
 04/27/2020   10:48:33   (  -0.01,-137.03) (   0.47,-139.25)  253.37                80
 04/28/2020   10:26:56   (  -0.01,-137.00) (  -0.52,-134.67)  265.80                80
 04/29/2020   22:48:34   (   0.01,-136.96) (  -0.65,-139.89)  334.31                80