Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/12/2020   22:46:43   (  -0.03,-137.20) (  -0.47,-139.24)  232.16                80
 07/13/2020   22:27:46   (  -0.02,-137.20) (   0.54,-134.66)  289.48                80
 07/15/2020   10:51:56   (   0.02,-137.19) (   0.60,-139.85)  303.19                80
 07/16/2020   10:30:20   (   0.01,-137.18) (  -0.41,-135.27)  217.73                80
 07/17/2020   22:51:58   (   0.00,-137.16) (  -0.77,-140.49)  380.20                80
 07/18/2020   22:35:43   (   0.01,-137.15) (   0.30,-135.92)  140.22                80
 07/20/2020   10:57:13   (  -0.01,-137.13) (   0.85,-141.12)  454.03                80
 07/21/2020   10:35:37   (  -0.01,-137.11) (  -0.15,-136.53)   66.10                80
 07/23/2020   22:38:18   (   0.01,-137.06) (  -0.00,-137.18)   13.07                80