Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/26/2020   22:50:32   (   0.00,-137.23) (  -0.53,-139.68)  278.23                80
 11/27/2020   22:34:15   (  -0.00,-137.23) (   0.46,-135.09)  244.43                80
 11/29/2020   10:53:04   (   0.00,-137.24) (   0.71,-140.27)  346.28                80
 11/30/2020   10:36:48   (   0.01,-137.24) (  -0.34,-135.69)  175.79                80
 12/01/2020   22:55:45   (  -0.00,-137.22) (  -0.83,-140.91)  421.11                80
 12/02/2020   22:39:28   (  -0.01,-137.21) (   0.22,-136.33)  100.49                80
 12/04/2020   10:58:18   (   0.01,-137.20) (   0.95,-141.52)  491.81                80
 12/05/2020   10:42:00   (   0.01,-137.19) (  -0.04,-136.93)   29.25                80
 12/07/2020   22:42:00   (  -0.01,-137.14) (  -0.13,-137.56)   48.37                80
 12/08/2020   22:25:44   (  -0.01,-137.12) (   0.92,-132.98)  472.36                80
 12/10/2020   10:44:33   (   0.00,-137.10) (   0.25,-138.16)  121.14                80