Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/10/2020   22:34:29   (  -0.03,-137.20) (   0.23,-136.04)  132.38                80
 01/12/2020   10:56:00   (   0.04,-137.19) (   0.97,-141.23)  461.29                80
 01/13/2020   10:34:24   (   0.04,-137.18) (  -0.06,-136.65)   59.07                80
 01/15/2020   22:39:48   (  -0.04,-137.14) (  -0.10,-137.31)   19.50                80
 01/18/2020   10:42:24   (   0.04,-137.11) (   0.20,-137.94)   93.84                80
 01/19/2020   10:20:47   (   0.04,-137.09) (  -0.77,-133.35)  425.84                80
 01/20/2020   22:45:07   (  -0.05,-137.06) (  -0.42,-138.58)  174.05                80
 01/21/2020   22:23:31   (  -0.05,-137.04) (   0.61,-134.01)  345.36                80
 01/23/2020   10:47:41   (   0.06,-137.01) (   0.58,-139.20)  250.07                80