Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/11/2020   22:28:33   (  -0.04,-137.22) (   0.58,-134.56)  303.89                80
 02/13/2020   10:50:02   (   0.04,-137.22) (   0.63,-139.75)  288.64                80
 02/14/2020   10:28:27   (   0.04,-137.21) (  -0.40,-135.17)  232.49                80
 02/15/2020   22:50:07   (  -0.05,-137.20) (  -0.75,-140.41)  365.18                80
 02/16/2020   22:33:51   (  -0.05,-137.20) (   0.23,-135.82)  155.72                80
 02/18/2020   10:55:21   (   0.05,-137.18) (   0.93,-141.02)  437.76                80
 02/19/2020   10:33:45   (   0.06,-137.17) (  -0.11,-136.45)   82.66                80
 02/21/2020   22:39:09   (  -0.06,-137.14) (  -0.05,-137.10)    4.18                80
 02/24/2020   10:41:44   (   0.07,-137.11) (   0.18,-137.72)   69.97                80