Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/06/2020   10:32:27   (   0.00,-137.17) (  -0.30,-135.71)  165.60                80
 08/07/2020   22:54:05   (  -0.00,-137.17) (  -0.85,-140.94)  429.65                80
 08/08/2020   22:37:48   (  -0.00,-137.17) (   0.16,-136.36)   92.28                80
 08/11/2020   10:37:42   (   0.00,-137.16) (  -0.01,-136.97)   21.15                80
 08/13/2020   22:40:24   (  -0.01,-137.14) (  -0.12,-137.62)   54.55                80
 08/14/2020   22:24:08   (  -0.01,-137.13) (   0.90,-133.03)  466.23                80
 08/16/2020   10:45:38   (   0.02,-137.10) (   0.27,-138.23)  128.35                80
 08/17/2020   10:24:02   (   0.02,-137.08) (  -0.74,-133.64)  391.83                80
 08/18/2020   22:45:40   (  -0.02,-137.06) (  -0.40,-138.88)  206.59                80
 08/19/2020   22:29:23   (  -0.02,-137.04) (   0.61,-134.29)  313.34                80