Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2020   10:50:03   (   0.04,-137.22) (   0.61,-139.75)  288.74                80
 02/14/2020   10:28:27   (   0.04,-137.21) (  -0.43,-135.18)  232.39                80
 02/15/2020   22:50:06   (  -0.05,-137.20) (  -0.78,-140.40)  365.02                80
 02/16/2020   22:33:51   (  -0.05,-137.20) (   0.26,-135.83)  155.87                80
 02/18/2020   10:55:21   (   0.05,-137.18) (   0.90,-141.03)  437.80                80
 02/19/2020   10:33:45   (   0.06,-137.17) (  -0.08,-136.44)   82.69                80
 02/21/2020   22:39:09   (  -0.06,-137.14) (  -0.08,-137.09)    5.39                80
 02/24/2020   10:41:43   (   0.07,-137.11) (   0.21,-137.72)   69.85                80
 02/25/2020   10:20:08   (   0.07,-137.09) (  -0.83,-133.14)  450.04                80