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,-137.16) (   0.01,-136.96)   21.78                80
 08/13/2020   22:40:24   (  -0.02,-137.15) (  -0.13,-137.61)   52.79                80
 08/14/2020   22:24:08   (   0.01,-137.14) (   0.94,-133.04)  467.64                80
 08/16/2020   10:45:38   (  -0.01,-137.12) (   0.22,-138.24)  127.26                80
 08/17/2020   10:26:42   (  -0.01,-137.10) (  -0.79,-133.65)  393.39                80
 08/18/2020   22:45:39   (   0.01,-137.09) (  -0.40,-138.87)  203.79                80
 08/19/2020   22:29:23   (   0.00,-137.07) (   0.61,-134.29)  316.53                80
 08/21/2020   10:50:53   (  -0.00,-137.03) (   0.55,-139.48)  279.12                80
 08/22/2020   10:31:57   (  -0.00,-137.01) (  -0.47,-134.90)  240.83                80
 08/23/2020   22:50:54   (   0.00,-136.99) (  -0.72,-140.12)  357.46                80