Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2019   10:46:40   (  -0.02,-137.18) (   0.39,-139.02)  209.74                80
 09/14/2019   10:25:05   (  -0.02,-137.17) (  -0.61,-134.44)  310.49                80
 09/15/2019   22:46:45   (   0.02,-137.15) (  -0.57,-139.68)  289.36                80
 09/16/2019   22:30:31   (   0.02,-137.14) (   0.49,-135.12)  230.56                80
 09/18/2019   10:52:02   (  -0.03,-137.12) (   0.68,-140.32)  364.11                80
 09/19/2019   10:30:27   (  -0.03,-137.11) (  -0.32,-135.74)  155.22                80
 09/20/2019   22:52:07   (   0.03,-137.07) (  -0.86,-140.98)  446.24                80
 09/21/2019   22:35:51   (   0.03,-137.05) (   0.14,-136.41)   72.57                80
 09/24/2019   10:35:48   (  -0.03,-136.99) (  -0.04,-137.05)    6.04                80