Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 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)
 01/09/2020   22:50:45   (  -0.04,-137.20) (  -0.78,-140.62)  388.82                80
 01/10/2020   22:34:29   (  -0.04,-137.19) (   0.19,-136.03)  131.67                80
 01/12/2020   10:56:00   (   0.04,-137.17) (   0.95,-141.23)  462.52                80
 01/13/2020   10:34:25   (   0.04,-137.16) (  -0.08,-136.66)   57.40                80
 01/15/2020   22:39:48   (  -0.04,-137.12) (  -0.08,-137.31)   22.09                80
 01/16/2020   22:18:13   (  -0.04,-137.10) (   0.95,-132.74)  497.58                80
 01/18/2020   10:42:23   (   0.05,-137.08) (   0.25,-137.93)   97.44                80
 01/19/2020   10:20:48   (   0.05,-137.06) (  -0.78,-133.36)  421.78                80
 01/20/2020   22:45:07   (  -0.06,-137.02) (  -0.41,-138.59)  178.72                80
 01/21/2020   22:23:32   (  -0.05,-137.00) (   0.62,-134.01)  340.23                80