Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/12/2020   10:56:00   (   0.04,-137.21) (   0.91,-141.24)  458.67                80
 01/13/2020   10:34:24   (   0.04,-137.21) (  -0.06,-136.65)   63.11                80
 01/15/2020   22:37:09   (  -0.04,-137.21) (  -0.04,-137.32)   12.33                80
 01/18/2020   10:42:24   (   0.04,-137.21) (   0.20,-137.94)   82.91                80
 01/19/2020   10:20:48   (   0.04,-137.21) (  -0.83,-133.37)  438.09                80
 01/20/2020   22:45:07   (  -0.05,-137.19) (  -0.36,-138.60)  159.84                80
 01/21/2020   22:23:32   (  -0.05,-137.18) (   0.67,-134.02)  360.89                80
 01/23/2020   10:47:42   (   0.06,-137.18) (   0.51,-139.22)  232.27                80
 01/24/2020   10:26:07   (   0.06,-137.16) (  -0.52,-134.64)  288.06                80
 01/25/2020   22:50:26   (  -0.07,-137.14) (  -0.67,-139.87)  310.89                80