Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/01/2020   10:42:27   (   0.04,-137.19) (   0.10,-137.40)   24.08                80
 09/02/2020   10:20:51   (   0.04,-137.19) (  -0.92,-132.82)  497.51                80
 09/03/2020   22:42:29   (  -0.04,-137.18) (  -0.23,-138.05)   99.40                80
 09/04/2020   22:26:12   (  -0.04,-137.17) (   0.79,-133.47)  422.05                80
 09/06/2020   10:45:03   (   0.04,-137.16) (   0.35,-138.66)  170.54                80
 09/07/2020   10:28:46   (   0.04,-137.15) (  -0.67,-134.08)  350.51                80
 09/08/2020   22:47:44   (  -0.03,-137.13) (  -0.54,-139.30)  247.74                80
 09/09/2020   22:31:27   (  -0.03,-137.12) (   0.48,-134.72)  272.78                80
 09/11/2020   10:50:17   (   0.03,-137.09) (   0.66,-139.91)  321.41                80
 09/12/2020   10:34:01   (   0.02,-137.07) (  -0.36,-135.33)  198.43                80
 09/13/2020   22:52:59   (  -0.01,-137.04) (  -0.80,-140.56)  401.71                80
 09/14/2020   22:36:43   (  -0.01,-137.01) (   0.22,-135.98)  117.74                80