Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 8.  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) (   0.34,-138.47)  142.21                80
 02/09/2020   10:23:08   (   0.05,-137.22) (  -0.70,-133.90)  379.26                80
 02/10/2020   22:44:48   (  -0.05,-137.21) (  -0.45,-139.13)  218.30                80
 02/11/2020   22:28:32   (  -0.05,-137.21) (   0.53,-134.55)  303.03                80
 02/13/2020   10:50:02   (   0.05,-137.21) (   0.63,-139.75)  289.17                80
 02/14/2020   10:28:27   (   0.05,-137.20) (  -0.41,-135.17)  231.73                80
 02/15/2020   22:50:06   (  -0.06,-137.18) (  -0.79,-140.40)  366.87                80
 02/16/2020   22:33:51   (  -0.06,-137.18) (   0.25,-135.83)  153.79                80
 02/18/2020   10:55:21   (   0.06,-137.16) (   0.90,-141.03)  439.37                80
 02/19/2020   10:33:44   (   0.07,-137.15) (  -0.08,-136.44)   80.86                80
 02/21/2020   22:39:08   (  -0.07,-137.11) (  -0.07,-137.10)    1.31                80