Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/13/2020   10:43:53   (   0.03,-137.20) (   0.25,-138.25)  119.28                80
 10/14/2020   10:27:37   (   0.03,-137.21) (  -0.78,-133.67)  403.21                80
 10/15/2020   22:46:35   (  -0.02,-137.21) (  -0.40,-138.90)  192.45                80
 10/16/2020   22:30:19   (  -0.03,-137.21) (   0.63,-134.31)  329.79                80
 10/18/2020   10:49:07   (   0.02,-137.20) (   0.56,-139.49)  261.85                80
 10/19/2020   10:32:50   (   0.03,-137.20) (  -0.47,-134.91)  259.85                80
 10/20/2020   22:51:49   (  -0.02,-137.18) (  -0.71,-140.14)  337.31                80
 10/21/2020   22:35:32   (  -0.02,-137.17) (   0.33,-135.56)  183.93                80
 10/23/2020   10:54:21   (   0.02,-137.16) (   0.81,-140.75)  409.03                80
 10/24/2020   10:38:05   (   0.01,-137.15) (  -0.22,-136.17)  111.92                80
 10/25/2020   22:57:03   (  -0.01,-137.13) (  -0.95,-141.39)  485.97                80