Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2020   10:42:01   (  -0.00,-137.21) (  -0.08,-136.93)   31.70                80
 12/07/2020   22:42:01   (   0.00,-137.18) (  -0.09,-137.56)   43.93                80
 12/08/2020   22:25:44   (   0.00,-137.17) (   0.96,-132.98)  477.27                80
 12/10/2020   10:44:33   (  -0.00,-137.15) (   0.21,-138.17)  116.09                80
 12/11/2020   10:28:16   (  -0.00,-137.13) (  -0.78,-133.58)  404.66                80
 12/12/2020   22:47:13   (  -0.00,-137.10) (  -0.37,-138.80)  193.54                80
 12/13/2020   22:30:56   (  -0.01,-137.08) (   0.62,-134.21)  326.78                80
 12/15/2020   10:52:25   (   0.01,-137.05) (   0.56,-139.39)  267.91                80
 12/16/2020   10:30:49   (   0.01,-137.02) (  -0.49,-134.81)  251.83                80
 12/17/2020   22:52:25   (  -0.00,-136.98) (  -0.71,-140.02)  347.71                80