Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/24/2020   10:47:51   (   0.00,-137.23) (   0.39,-139.04)  205.77                80
 11/25/2020   10:31:34   (   0.01,-137.24) (  -0.59,-134.45)  317.27                80
 11/26/2020   22:50:32   (  -0.00,-137.23) (  -0.52,-139.68)  278.34                80
 11/27/2020   22:34:15   (  -0.01,-137.24) (   0.46,-135.09)  244.37                80
 11/29/2020   10:53:04   (   0.00,-137.24) (   0.70,-140.28)  345.92                80
 11/30/2020   10:36:48   (   0.01,-137.24) (  -0.34,-135.70)  176.24                80
 12/01/2020   22:55:45   (  -0.01,-137.22) (  -0.82,-140.92)  420.75                80
 12/02/2020   22:39:27   (  -0.01,-137.21) (   0.17,-136.33)  100.87                80
 12/04/2020   10:58:17   (   0.01,-137.21) (   1.00,-141.51)  491.08                80
 12/05/2020   10:42:00   (   0.01,-137.20) (  -0.05,-136.93)   30.02                80