Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2020   10:44:03   (   0.00,-137.21) (   0.24,-138.25)  118.64                80
 03/17/2020   10:22:27   (   0.00,-137.21) (  -0.81,-133.68)  402.67                80
 03/18/2020   22:44:06   (  -0.01,-137.20) (  -0.41,-138.90)  194.29                80
 03/19/2020   22:27:50   (  -0.01,-137.20) (   0.64,-134.33)  327.05                80
 03/21/2020   10:49:20   (   0.01,-137.19) (   0.55,-139.52)  265.87                80
 03/22/2020   10:27:45   (   0.01,-137.18) (  -0.49,-134.94)  255.02                80
 03/23/2020   22:49:24   (  -0.01,-137.17) (  -0.65,-140.18)  342.85                80
 03/24/2020   22:33:08   (  -0.01,-137.16) (   0.33,-135.59)  178.05                80
 03/26/2020   10:54:39   (   0.01,-137.15) (   0.81,-140.80)  415.37                80
 03/27/2020   10:33:03   (   0.01,-137.14) (  -0.18,-136.21)  104.91                80