Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/03/2021   22:42:23   (   0.02,-137.24) (   0.01,-137.36)   13.31                80
 02/06/2021   10:47:34   (  -0.01,-137.22) (   0.14,-137.95)   83.05                80
 02/07/2021   10:25:57   (   0.01,-137.21) (  -0.87,-133.36)  438.89                80
 02/08/2021   22:47:34   (  -0.01,-137.19) (  -0.32,-138.58)  157.66                80
 02/09/2021   22:31:17   (  -0.01,-137.18) (   0.69,-133.98)  363.57                80
 02/11/2021   10:52:45   (   0.00,-137.16) (   0.46,-139.17)  229.42                80
 02/12/2021   10:31:07   (   0.00,-137.14) (  -0.55,-134.58)  291.66                80
 02/13/2021   22:52:46   (  -0.00,-137.12) (  -0.58,-139.81)  305.46                80
 02/14/2021   22:36:28   (  -0.00,-137.11) (   0.43,-135.22)  215.63                80