Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 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)
 07/05/2020   10:41:24   (   0.02,-137.18) (   0.05,-137.33)   16.96                80
 07/07/2020   22:41:27   (  -0.02,-137.16) (  -0.18,-137.98)   93.13                80
 07/08/2020   22:25:10   (  -0.02,-137.15) (   0.83,-133.40)  428.18                80
 07/10/2020   10:46:39   (   0.03,-137.14) (   0.36,-138.58)  164.52                80
 07/11/2020   10:25:03   (   0.03,-137.13) (  -0.65,-134.00)  356.37                80
 07/12/2020   22:46:41   (  -0.03,-137.11) (  -0.53,-139.23)  241.77                80
 07/13/2020   22:30:26   (  -0.02,-137.10) (   0.55,-134.66)  278.85                80
 07/15/2020   10:51:55   (   0.02,-137.08) (   0.65,-139.84)  315.14                80
 07/16/2020   10:30:20   (   0.00,-137.06) (  -0.42,-135.27)  204.51                80
 07/17/2020   22:51:58   (   0.01,-137.02) (  -0.75,-140.50)  395.47                80