Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/08/2020   22:22:30   (  -0.02,-137.19) (   0.83,-133.40)  432.39                80
 07/10/2020   10:46:40   (   0.02,-137.20) (   0.31,-138.60)  158.30                80
 07/11/2020   10:25:04   (   0.02,-137.20) (  -0.70,-134.01)  363.87                80
 07/12/2020   22:46:42   (  -0.02,-137.20) (  -0.49,-139.24)  232.34                80
 07/13/2020   22:30:27   (  -0.02,-137.20) (   0.58,-134.67)  289.50                80
 07/15/2020   10:51:56   (   0.01,-137.20) (   0.63,-139.85)  302.50                80
 07/16/2020   10:30:21   (   0.00,-137.19) (  -0.44,-135.28)  218.54                80
 07/17/2020   22:51:59   (   0.01,-137.17) (  -0.74,-140.50)  379.52                80
 07/18/2020   22:35:42   (   0.01,-137.16) (   0.27,-135.92)  141.28                80
 07/20/2020   10:57:13   (  -0.01,-137.15) (   0.89,-141.11)  452.12                80
 07/21/2020   10:35:36   (  -0.01,-137.13) (  -0.12,-136.53)   68.23                80