Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 13.  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,-137.19) (   0.27,-138.47)  145.14                80
 05/14/2020   10:23:52   (  -0.01,-137.19) (  -0.73,-133.88)  376.40                80
 05/15/2020   22:45:31   (   0.01,-137.19) (  -0.41,-139.12)  219.65                80
 05/16/2020   22:29:15   (   0.01,-137.18) (   0.59,-134.53)  301.83                80
 05/18/2020   10:50:45   (  -0.00,-137.17) (   0.56,-139.73)  291.18                80
 05/19/2020   10:29:08   (  -0.01,-137.17) (  -0.44,-135.15)  229.88                80
 05/20/2020   22:50:48   (   0.00,-137.15) (  -0.71,-140.38)  367.41                80
 05/21/2020   22:34:31   (   0.01,-137.14) (   0.29,-135.79)  153.32                80
 05/23/2020   10:56:02   (  -0.00,-137.12) (   0.86,-140.99)  440.89                80
 05/24/2020   10:34:25   (  -0.00,-137.11) (  -0.14,-136.41)   79.19                80
 05/26/2020   22:37:08   (  -0.00,-137.06) (  -0.01,-137.06)    0.48                80