Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 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)
 02/08/2020   10:44:44   (   0.05,-137.22) (   0.30,-138.48)  142.20                80
 02/09/2020   10:23:08   (   0.05,-137.22) (  -0.67,-133.89)  379.26                80
 02/10/2020   22:44:48   (  -0.05,-137.21) (  -0.47,-139.13)  218.45                80
 02/11/2020   22:28:32   (  -0.05,-137.21) (   0.57,-134.56)  302.83                80
 02/13/2020   10:50:02   (   0.05,-137.21) (   0.64,-139.74)  289.34                80
 02/14/2020   10:28:26   (   0.05,-137.20) (  -0.40,-135.17)  231.55                80
 02/15/2020   22:50:05   (  -0.06,-137.18) (  -0.79,-140.40)  367.18                80
 02/16/2020   22:33:50   (  -0.06,-137.17) (   0.25,-135.83)  153.46                80
 02/18/2020   10:55:19   (   0.06,-137.16) (   0.95,-141.01)  439.65                80
 02/19/2020   10:33:44   (   0.07,-137.15) (  -0.09,-136.44)   80.56                80