Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/24/2019   10:35:48   (  -0.02,-137.20) (  -0.03,-137.04)   17.79                80
 09/26/2019   22:38:34   (   0.01,-137.18) (  -0.10,-137.71)   60.48                80
 09/27/2019   22:22:19   (   0.01,-137.17) (   0.91,-133.14)  459.85                80
 09/29/2019   10:41:10   (  -0.00,-137.15) (   0.25,-138.34)  134.94                80
 09/30/2019   10:24:54   (   0.00,-137.14) (  -0.75,-133.76)  385.05                80
 10/01/2019   22:43:55   (  -0.01,-137.12) (  -0.44,-139.00)  214.36                80
 10/02/2019   22:27:39   (  -0.01,-137.11) (   0.57,-134.43)  305.41                80
 10/04/2019   10:46:31   (   0.02,-137.08) (   0.59,-139.63)  290.36                80
 10/05/2019   10:27:35   (   0.02,-137.06) (  -0.42,-135.05)  228.81                80