Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/09/2020   10:23:09   (   0.04,-137.22) (  -0.73,-133.90)  379.23                80
 02/10/2020   22:44:48   (  -0.04,-137.22) (  -0.48,-139.13)  217.85                80
 02/11/2020   22:28:32   (  -0.04,-137.22) (   0.55,-134.55)  303.65                80
 02/13/2020   10:50:03   (   0.04,-137.22) (   0.60,-139.75)  288.51                80
 02/14/2020   10:28:27   (   0.04,-137.21) (  -0.43,-135.18)  232.59                80
 02/15/2020   22:50:07   (  -0.05,-137.20) (  -0.77,-140.41)  365.57                80
 02/16/2020   22:33:51   (  -0.05,-137.19) (   0.26,-135.83)  155.28                80
 02/18/2020   10:55:21   (   0.05,-137.18) (   0.89,-141.03)  437.84                80
 02/19/2020   10:33:45   (   0.06,-137.17) (  -0.09,-136.44)   82.58                80
 02/21/2020   22:39:09   (  -0.06,-137.13) (  -0.07,-137.10)    3.98                80