Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/02/2019   22:25:00   (   0.02,-137.19) (   0.63,-134.43)  314.10                80
 10/04/2019   10:49:12   (   0.00,-137.19) (   0.53,-139.64)  278.80                80
 10/05/2019   10:27:36   (  -0.00,-137.18) (  -0.48,-135.06)  241.45                80
 10/06/2019   22:51:56   (   0.00,-137.16) (  -0.72,-140.30)  358.37                80
 10/07/2019   22:30:22   (   0.00,-137.15) (   0.35,-135.74)  161.61                80
 10/09/2019   10:54:32   (  -0.00,-137.14) (   0.87,-140.93)  432.47                80
 10/10/2019   10:32:58   (  -0.01,-137.13) (  -0.20,-136.36)   87.30                80
 10/12/2019   22:35:43   (  -0.02,-137.08) (   0.01,-137.03)    7.54                80
 10/15/2019   10:38:19   (   0.03,-137.05) (   0.14,-137.65)   68.61                80