Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2020   22:23:58   (   0.02,-137.20) (   0.89,-133.27)  447.23                80
 05/13/2020   10:45:28   (  -0.01,-137.20) (   0.27,-138.47)  144.87                80
 05/14/2020   10:23:52   (  -0.01,-137.20) (  -0.73,-133.88)  376.89                80
 05/15/2020   22:45:31   (   0.01,-137.20) (  -0.42,-139.12)  219.05                80
 05/16/2020   22:29:15   (   0.01,-137.19) (   0.58,-134.53)  302.66                80
 05/18/2020   10:50:45   (  -0.01,-137.19) (   0.57,-139.73)  289.86                80
 05/19/2020   10:29:09   (  -0.01,-137.18) (  -0.48,-135.16)  231.43                80
 05/20/2020   22:50:48   (   0.00,-137.17) (  -0.72,-140.38)  365.75                80
 05/21/2020   22:34:32   (   0.01,-137.16) (   0.33,-135.81)  155.21                80
 05/23/2020   10:56:02   (  -0.00,-137.15) (   0.87,-140.99)  438.50                80
 05/24/2020   10:34:26   (  -0.00,-137.13) (  -0.18,-136.42)   81.82                80