Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/04/2020   22:55:03   (  -0.03,-137.21) (  -0.85,-140.98)  430.00                80
 10/05/2020   22:38:46   (  -0.04,-137.21) (   0.17,-136.40)   92.27                80
 10/07/2020   10:57:35   (   0.03,-137.21) (   1.03,-141.58)  499.09                80
 10/08/2020   10:41:18   (   0.03,-137.20) (   0.01,-137.00)   22.55                80
 10/10/2020   22:41:21   (  -0.02,-137.17) (  -0.11,-137.65)   54.28                80
 10/11/2020   22:25:05   (  -0.02,-137.16) (   0.92,-133.07)  466.70                80
 10/13/2020   10:43:53   (   0.01,-137.15) (   0.28,-138.25)  126.33                80
 10/14/2020   10:27:36   (   0.01,-137.13) (  -0.74,-133.67)  394.33                80
 10/15/2020   22:46:35   (  -0.01,-137.10) (  -0.44,-138.89)  204.63                80
 10/16/2020   22:30:18   (  -0.01,-137.09) (   0.59,-134.31)  315.79                80