Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/20/2020   22:51:50   (  -0.03,-137.19) (  -0.67,-140.14)  336.46                80
 10/21/2020   22:35:33   (  -0.03,-137.18) (   0.36,-135.56)  184.87                80
 10/23/2020   10:54:21   (   0.02,-137.17) (   0.83,-140.74)  407.33                80
 10/24/2020   10:38:05   (   0.02,-137.16) (  -0.20,-136.16)  113.73                80
 10/25/2020   22:57:03   (  -0.01,-137.14) (  -0.99,-141.38)  484.64                80
 10/26/2020   22:40:47   (  -0.01,-137.13) (   0.05,-136.80)   36.38                80
 10/29/2020   10:40:40   (   0.01,-137.10) (   0.07,-137.41)   35.43                80
 10/30/2020   10:24:23   (   0.01,-137.09) (  -0.96,-132.83)  485.26                80
 10/31/2020   22:43:21   (  -0.01,-137.05) (  -0.21,-138.06)  113.91                80
 11/01/2020   22:27:04   (  -0.01,-137.03) (   0.77,-133.46)  406.36                80