Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 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)
 11/01/2020   22:27:04   (  -0.02,-137.21) (   0.80,-133.46)  426.33                80
 11/03/2020   10:45:53   (   0.02,-137.20) (   0.33,-138.66)  165.79                80
 11/04/2020   10:29:37   (   0.02,-137.19) (  -0.70,-134.07)  355.55                80
 11/05/2020   22:48:34   (  -0.02,-137.17) (  -0.52,-139.29)  242.18                80
 11/06/2020   22:32:18   (  -0.02,-137.16) (   0.52,-134.71)  278.69                80
 11/08/2020   10:51:07   (   0.01,-137.13) (   0.62,-139.90)  314.92                80
 11/09/2020   10:34:50   (   0.01,-137.12) (  -0.42,-135.32)  205.53                80
 11/10/2020   22:53:48   (  -0.01,-137.09) (  -0.79,-140.53)  393.27                80
 11/11/2020   22:37:31   (  -0.01,-137.07) (   0.25,-135.95)  126.97                80
 11/13/2020   10:56:20   (   0.01,-137.04) (   0.90,-141.14)  467.52                80
 11/14/2020   10:40:03   (   0.01,-137.01) (  -0.08,-136.55)   52.26                80