Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 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)
 09/14/2019   10:25:05   (  -0.02,-137.17) (  -0.61,-134.44)  310.59                80
 09/15/2019   22:46:45   (   0.02,-137.15) (  -0.57,-139.68)  288.95                80
 09/16/2019   22:30:31   (   0.02,-137.14) (   0.49,-135.11)  230.98                80
 09/18/2019   10:52:02   (  -0.02,-137.12) (   0.69,-140.32)  364.02                80
 09/19/2019   10:30:27   (  -0.02,-137.11) (  -0.31,-135.74)  155.30                80
 09/20/2019   22:52:07   (   0.02,-137.07) (  -0.88,-140.98)  445.82                80
 09/21/2019   22:35:52   (   0.02,-137.05) (   0.18,-136.41)   73.02                80
 09/24/2019   10:38:28   (  -0.02,-136.99) (  -0.02,-137.04)    5.49                80
 09/26/2019   22:38:33   (   0.02,-136.91) (  -0.17,-137.70)   90.37                80
 09/27/2019   22:22:19   (   0.02,-136.88) (   0.89,-133.14)  427.60                80