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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/11/2020   22:37:32   (  -0.02,-137.24) (   0.29,-135.95)  146.57                80
 11/13/2020   10:56:20   (   0.01,-137.23) (   0.92,-141.13)  445.13                80
 11/14/2020   10:40:04   (   0.02,-137.23) (  -0.12,-136.55)   76.76                80
 11/16/2020   22:40:05   (  -0.02,-137.20) (  -0.04,-137.18)    2.99                80
 11/19/2020   10:42:37   (   0.01,-137.17) (   0.15,-137.79)   70.58                80
 11/20/2020   10:26:21   (   0.01,-137.16) (  -0.89,-133.21)  450.29                80
 11/21/2020   22:45:18   (  -0.01,-137.14) (  -0.29,-138.43)  147.30                80
 11/22/2020   22:29:02   (  -0.01,-137.12) (   0.75,-133.85)  373.56                80
 11/24/2020   10:47:50   (   0.01,-137.10) (   0.47,-139.03)  220.21                80
 11/25/2020   10:31:34   (   0.01,-137.08) (  -0.57,-134.45)  300.43                80