Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2020   22:45:18   (  -0.01,-137.21) (  -0.31,-138.43)  139.87                80
 11/22/2020   22:29:02   (  -0.01,-137.21) (   0.73,-133.85)  383.42                80
 11/24/2020   10:47:51   (   0.01,-137.24) (   0.43,-139.04)  205.63                80
 11/25/2020   10:31:34   (   0.01,-137.24) (  -0.61,-134.46)  317.46                80
 11/26/2020   22:50:32   (  -0.00,-137.24) (  -0.56,-139.67)  278.00                80
 11/27/2020   22:34:15   (  -0.01,-137.24) (   0.48,-135.09)  244.74                80
 11/29/2020   10:53:05   (   0.01,-137.25) (   0.69,-140.28)  345.45                80
 11/30/2020   10:36:48   (   0.01,-137.25) (  -0.35,-135.70)  176.76                80
 12/01/2020   22:55:45   (  -0.01,-137.23) (  -0.81,-140.92)  420.10                80
 12/02/2020   22:39:28   (  -0.01,-137.22) (   0.17,-136.33)  101.55                80
 12/04/2020   10:58:18   (   0.00,-137.22) (   0.95,-141.53)  490.39                80