Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 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)
 09/06/2020   10:47:42   (   0.06,-137.16) (   0.39,-138.65)  170.39                80
 09/07/2020   10:26:06   (   0.06,-137.15) (  -0.63,-134.07)  350.54                80
 09/08/2020   22:47:44   (  -0.05,-137.13) (  -0.52,-139.30)  246.88                80
 09/09/2020   22:31:27   (  -0.05,-137.12) (   0.50,-134.72)  273.54                80
 09/11/2020   10:50:17   (   0.05,-137.09) (   0.70,-139.90)  321.60                80
 09/12/2020   10:34:00   (   0.04,-137.06) (  -0.32,-135.32)  198.21                80
 09/13/2020   22:52:59   (  -0.04,-137.03) (  -0.83,-140.55)  401.10                80
 09/14/2020   22:36:42   (  -0.03,-137.01) (   0.19,-135.97)  118.32                80
 09/16/2020   10:55:32   (   0.02,-136.97) (   0.94,-141.17)  477.98                80
 09/17/2020   10:39:16   (   0.02,-136.94) (  -0.08,-136.58)   41.27                80
 09/19/2020   22:39:17   (  -0.02,-136.87) (  -0.12,-137.22)   40.08                80