Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2020   10:51:56   (   0.03,-137.21) (   0.60,-139.85)  300.75                80
 07/16/2020   10:30:20   (   0.02,-137.21) (  -0.41,-135.27)  221.64                80
 07/17/2020   22:54:38   (  -0.01,-137.22) (  -0.77,-140.49)  373.52                80
 07/18/2020   22:33:03   (  -0.00,-137.22) (   0.31,-135.92)  148.32                80
 07/20/2020   10:57:13   (  -0.01,-137.22) (   0.84,-141.12)  444.37                80
 07/21/2020   10:35:36   (  -0.02,-137.21) (  -0.17,-136.54)   77.06                80
 07/23/2020   22:40:58   (   0.02,-137.20) (   0.03,-137.18)    2.14                80
 07/26/2020   10:43:32   (  -0.01,-137.17) (   0.11,-137.79)   70.26                80
 07/27/2020   10:21:56   (  -0.01,-137.16) (  -0.90,-133.21)  450.55                80