Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 10.  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,-137.20) (  -0.12,-137.86)   74.50                80
 05/11/2020   22:23:58   (   0.01,-137.21) (   0.88,-133.27)  448.00                80
 05/13/2020   10:45:28   (  -0.01,-137.21) (   0.28,-138.47)  143.27                80
 05/14/2020   10:23:53   (  -0.01,-137.22) (  -0.78,-133.90)  378.92                80
 05/15/2020   22:45:31   (   0.01,-137.22) (  -0.43,-139.12)  216.57                80
 05/16/2020   22:29:15   (   0.01,-137.22) (   0.63,-134.55)  305.58                80
 05/18/2020   10:50:45   (  -0.00,-137.22) (   0.59,-139.73)  286.10                80
 05/19/2020   10:29:09   (  -0.00,-137.22) (  -0.47,-135.16)  235.61                80
 05/20/2020   22:50:49   (   0.00,-137.22) (  -0.68,-140.39)  361.12                80
 05/21/2020   22:34:32   (   0.00,-137.21) (   0.32,-135.81)  160.27                80
 05/23/2020   10:56:02   (  -0.00,-137.20) (   0.84,-141.00)  432.55                80