Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/30/2020   10:36:47   (   0.00,-137.24) (  -0.32,-135.69)  176.28                80
 12/01/2020   22:55:44   (  -0.00,-137.23) (  -0.85,-140.91)  420.09                80
 12/02/2020   22:39:28   (  -0.01,-137.22) (   0.20,-136.33)  101.69                80
 12/04/2020   10:58:17   (   0.00,-137.21) (   0.97,-141.52)  490.49                80
 12/05/2020   10:42:01   (   0.01,-137.20) (  -0.08,-136.94)   30.85                80
 12/07/2020   22:42:01   (  -0.00,-137.16) (  -0.09,-137.57)   46.06                80
 12/08/2020   22:25:43   (  -0.00,-137.14) (   0.91,-132.97)  474.82                80
 12/10/2020   10:44:33   (   0.00,-137.13) (   0.21,-138.17)  118.63                80
 12/11/2020   10:28:16   (   0.00,-137.11) (  -0.78,-133.58)  401.81                80
 12/12/2020   22:47:12   (  -0.00,-137.07) (  -0.42,-138.79)  197.29                80
 12/13/2020   22:30:56   (  -0.01,-137.04) (   0.63,-134.21)  322.66                80