Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/25/2020   10:31:34   (   0.00,-137.24) (  -0.62,-134.46)  317.18                80
 11/26/2020   22:50:32   (  -0.00,-137.23) (  -0.56,-139.67)  278.29                80
 11/27/2020   22:34:15   (  -0.01,-137.23) (   0.49,-135.09)  244.37                80
 11/29/2020   10:53:05   (   0.00,-137.24) (   0.68,-140.28)  346.19                80
 11/30/2020   10:36:48   (   0.01,-137.24) (  -0.37,-135.70)  175.93                80
 12/01/2020   22:55:44   (  -0.01,-137.22) (  -0.86,-140.91)  421.02                80
 12/02/2020   22:39:28   (  -0.01,-137.21) (   0.19,-136.33)  100.53                80
 12/04/2020   10:58:17   (   0.01,-137.20) (   0.98,-141.51)  491.62                80
 12/05/2020   10:42:01   (   0.01,-137.19) (  -0.06,-136.94)   29.44                80
 12/07/2020   22:42:01   (  -0.00,-137.14) (  -0.10,-137.56)   48.05                80
 12/08/2020   22:25:44   (  -0.00,-137.13) (   0.95,-132.99)  472.59                80