Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/05/2020   22:47:41   (   0.00,-137.18) (  -0.55,-139.58)  274.00                80
 06/06/2020   22:31:26   (   0.01,-137.17) (   0.51,-135.01)  247.05                80
 06/08/2020   10:52:55   (  -0.01,-137.16) (   0.66,-140.20)  345.96                80
 06/09/2020   10:31:19   (  -0.01,-137.15) (  -0.34,-135.61)  174.80                80
 06/10/2020   22:52:58   (   0.01,-137.13) (  -0.82,-140.85)  423.32                80
 06/11/2020   22:36:42   (   0.01,-137.12) (   0.18,-136.26)   97.45                80
 06/13/2020   10:58:11   (  -0.00,-137.11) (   1.00,-141.45)  495.84                80
 06/14/2020   10:36:35   (  -0.00,-137.09) (  -0.07,-136.88)   24.64                80
 06/16/2020   22:39:18   (   0.00,-137.05) (  -0.09,-137.53)   54.20                80
 06/17/2020   22:23:02   (   0.00,-137.03) (   0.92,-132.94)  465.84                80