Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2020   10:37:42   (   0.03,-137.18) (   0.00,-136.96)   23.84                80
 08/13/2020   22:40:24   (  -0.02,-137.19) (  -0.13,-137.61)   48.92                80
 08/14/2020   22:24:08   (   0.02,-137.19) (   0.94,-133.04)  472.36                80
 08/16/2020   10:45:39   (  -0.01,-137.19) (   0.22,-138.24)  119.75                80
 08/17/2020   10:24:02   (  -0.01,-137.18) (  -0.80,-133.65)  401.93                80
 08/18/2020   22:45:39   (   0.01,-137.17) (  -0.40,-138.87)  194.53                80
 08/19/2020   22:29:24   (   0.00,-137.16) (   0.67,-134.30)  326.88                80
 08/21/2020   10:50:54   (  -0.00,-137.15) (   0.49,-139.50)  266.28                80
 08/22/2020   10:29:18   (  -0.00,-137.14) (  -0.52,-134.91)  254.76                80
 08/23/2020   22:50:55   (   0.00,-137.12) (  -0.67,-140.13)  342.80                80