Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2020   10:20:50   (   0.04,-137.19) (  -0.91,-132.82)  497.60                80
 09/03/2020   22:42:29   (  -0.04,-137.18) (  -0.24,-138.05)   99.20                80
 09/04/2020   22:26:12   (  -0.04,-137.17) (   0.78,-133.46)  422.23                80
 09/06/2020   10:45:03   (   0.04,-137.16) (   0.37,-138.66)  170.55                80
 09/07/2020   10:28:46   (   0.04,-137.15) (  -0.65,-134.08)  350.45                80
 09/08/2020   22:47:44   (  -0.04,-137.13) (  -0.50,-139.31)  247.69                80
 09/09/2020   22:31:28   (  -0.03,-137.11) (   0.52,-134.72)  272.78                80
 09/11/2020   10:50:17   (   0.03,-137.09) (   0.68,-139.91)  321.58                80
 09/12/2020   10:34:01   (   0.02,-137.07) (  -0.34,-135.33)  198.26                80
 09/13/2020   22:52:59   (  -0.01,-137.03) (  -0.82,-140.55)  401.82                80
 09/14/2020   22:36:43   (  -0.01,-137.01) (   0.20,-135.97)  117.63                80