Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/10/2020   22:40:14   (   0.01,-137.19) (  -0.11,-137.86)   75.91                80
 05/11/2020   22:23:58   (   0.01,-137.18) (   0.89,-133.27)  445.54                80
 05/13/2020   10:45:28   (  -0.01,-137.18) (   0.27,-138.47)  147.32                80
 05/14/2020   10:23:52   (  -0.01,-137.17) (  -0.72,-133.88)  373.79                80
 05/15/2020   22:45:31   (   0.01,-137.16) (  -0.42,-139.12)  223.41                80
 05/16/2020   22:29:15   (   0.01,-137.15) (   0.58,-134.53)  297.66                80
 05/18/2020   10:50:45   (  -0.00,-137.14) (   0.58,-139.73)  295.60                80
 05/19/2020   10:29:08   (  -0.00,-137.13) (  -0.42,-135.15)  225.05                80
 05/20/2020   22:50:48   (   0.00,-137.10) (  -0.73,-140.38)  373.38                80
 05/21/2020   22:34:31   (   0.00,-137.09) (   0.27,-135.80)  146.94                80