Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 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)
 03/02/2021   22:33:05   (   0.04,-137.22) (   0.71,-134.31)  332.18                80
 03/04/2021   10:54:32   (  -0.04,-137.22) (   0.48,-139.49)  258.82                80
 03/05/2021   10:32:55   (  -0.04,-137.21) (  -0.53,-134.90)  263.45                80
 03/06/2021   22:54:32   (   0.03,-137.21) (  -0.64,-140.11)  331.82                80
 03/07/2021   22:38:15   (   0.03,-137.20) (   0.43,-135.54)  190.23                80
 03/09/2021   10:59:43   (  -0.02,-137.18) (   0.77,-140.71)  401.68                80
 03/10/2021   10:38:05   (  -0.01,-137.17) (  -0.25,-136.12)  120.09                80
 03/11/2021   22:59:42   (   0.00,-137.16) (  -0.91,-141.34)  475.75                80
 03/12/2021   22:43:25   (   0.00,-137.15) (   0.10,-136.75)   45.93                80
 03/15/2021   10:45:56   (  -0.01,-137.12) (   0.03,-137.34)   25.19                80
 03/16/2021   10:24:18   (  -0.01,-137.10) (  -0.98,-132.75)  495.98                80