Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2020   10:50:41   (   0.03,-137.22) (   0.63,-139.96)  311.78                80
 01/08/2020   10:29:06   (   0.03,-137.21) (  -0.40,-135.38)  209.07                80
 01/09/2020   22:53:25   (  -0.04,-137.20) (  -0.78,-140.62)  389.10                80
 01/10/2020   22:31:50   (  -0.04,-137.19) (   0.25,-136.04)  131.29                80
 01/12/2020   10:56:00   (   0.04,-137.17) (   0.95,-141.23)  462.88                80
 01/13/2020   10:34:24   (   0.04,-137.16) (  -0.08,-136.66)   56.96                80
 01/15/2020   22:39:48   (  -0.04,-137.11) (  -0.07,-137.31)   22.89                80
 01/16/2020   22:18:13   (  -0.04,-137.09) (   0.96,-132.74)  496.74                80
 01/18/2020   10:42:23   (   0.05,-137.07) (   0.23,-137.93)   98.25                80
 01/19/2020   10:20:48   (   0.04,-137.05) (  -0.80,-133.36)  420.91                80
 01/20/2020   22:45:07   (  -0.05,-137.01) (  -0.39,-138.59)  179.81                80