Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2020   10:45:28   (  -0.01,-137.20) (   0.27,-138.47)  144.93                80
 05/14/2020   10:23:52   (  -0.01,-137.19) (  -0.73,-133.88)  376.79                80
 05/15/2020   22:45:31   (   0.01,-137.19) (  -0.41,-139.12)  219.16                80
 05/16/2020   22:29:15   (   0.01,-137.19) (   0.58,-134.53)  302.52                80
 05/18/2020   10:50:45   (  -0.01,-137.19) (   0.57,-139.73)  290.08                80
 05/19/2020   10:29:08   (  -0.01,-137.18) (  -0.43,-135.15)  231.17                80
 05/20/2020   22:50:48   (   0.01,-137.17) (  -0.71,-140.38)  366.02                80
 05/21/2020   22:34:31   (   0.01,-137.16) (   0.28,-135.79)  154.90                80
 05/23/2020   10:56:02   (  -0.00,-137.14) (   0.86,-140.99)  438.89                80
 05/24/2020   10:34:25   (  -0.00,-137.13) (  -0.14,-136.41)   81.40                80