Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 15.  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) (   0.89,-141.30)  470.98                80
 04/17/2020   10:35:18   (  -0.02,-137.15) (  -0.10,-136.72)   49.51                80
 04/19/2020   22:38:01   (   0.01,-137.13) (  -0.02,-137.37)   27.65                80
 04/20/2020   22:21:44   (   0.01,-137.11) (   0.97,-132.79)  492.71                80
 04/22/2020   10:43:16   (  -0.01,-137.09) (   0.17,-137.99)  102.50                80
 04/23/2020   10:21:39   (  -0.01,-137.07) (  -0.83,-133.40)  417.26                80
 04/24/2020   22:43:18   (   0.01,-137.04) (  -0.35,-138.63)  181.77                80
 04/25/2020   22:27:02   (   0.01,-137.01) (   0.70,-134.06)  337.66                80
 04/27/2020   10:48:32   (  -0.01,-136.98) (   0.49,-139.25)  258.81                80
 04/28/2020   10:26:56   (  -0.01,-136.95) (  -0.50,-134.66)  259.91                80