Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/30/2019   10:22:16   (  -0.03,-137.21) (  -0.82,-133.77)  391.75                80
 10/01/2019   22:46:36   (   0.01,-137.20) (  -0.38,-139.01)  206.35                80
 10/02/2019   22:25:00   (   0.01,-137.19) (   0.62,-134.43)  314.65                80
 10/04/2019   10:49:12   (   0.00,-137.19) (   0.53,-139.64)  278.52                80
 10/05/2019   10:27:36   (  -0.00,-137.19) (  -0.47,-135.06)  241.82                80
 10/06/2019   22:51:56   (  -0.00,-137.17) (  -0.72,-140.30)  357.58                80
 10/07/2019   22:30:22   (   0.00,-137.16) (   0.34,-135.74)  162.51                80
 10/09/2019   10:54:32   (   0.00,-137.15) (   0.87,-140.93)  431.59                80
 10/10/2019   10:32:58   (  -0.00,-137.14) (  -0.19,-136.36)   88.30                80
 10/12/2019   22:35:43   (  -0.01,-137.10) (   0.00,-137.03)    8.21                80