Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 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)
 03/01/2020   10:25:28   (   0.01,-137.22) (  -0.63,-134.43)  318.53                80
 03/02/2020   22:47:07   (  -0.01,-137.22) (  -0.55,-139.66)  278.43                80
 03/03/2020   22:30:52   (  -0.01,-137.22) (   0.49,-135.09)  242.96                80
 03/05/2020   10:52:22   (   0.01,-137.21) (   0.69,-140.28)  349.80                80
 03/06/2020   10:30:47   (   0.01,-137.20) (  -0.35,-135.71)  170.96                80
 03/07/2020   22:52:26   (  -0.01,-137.19) (  -0.83,-140.94)  427.68                80
 03/08/2020   22:36:09   (  -0.00,-137.17) (   0.16,-136.36)   92.84                80
 03/11/2020   10:36:04   (   0.00,-137.15) (  -0.01,-136.98)   19.44                80
 03/13/2020   22:38:48   (  -0.00,-137.10) (  -0.11,-137.63)   60.20                80
 03/14/2020   22:22:32   (  -0.00,-137.09) (   0.88,-133.05)  459.56                80