Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/08/2019   10:41:18   (  -0.02,-137.21) (   0.11,-137.71)   58.18                80
 09/09/2019   10:19:44   (  -0.02,-137.20) (  -0.95,-133.15)  462.59                80
 09/10/2019   22:41:24   (   0.02,-137.19) (  -0.23,-138.39)  136.64                80
 09/11/2019   22:25:09   (   0.02,-137.18) (   0.77,-133.81)  383.98                80
 09/13/2019   10:44:00   (  -0.01,-137.18) (   0.42,-139.01)  209.07                80
 09/14/2019   10:27:46   (  -0.01,-137.18) (  -0.64,-134.45)  311.35                80
 09/15/2019   22:46:46   (   0.01,-137.15) (  -0.54,-139.69)  288.70                80
 09/16/2019   22:30:30   (   0.01,-137.14) (   0.46,-135.11)  231.34                80
 09/18/2019   10:49:22   (  -0.01,-137.13) (   0.71,-140.31)  362.80                80
 09/19/2019   10:33:06   (  -0.01,-137.12) (  -0.29,-135.74)  156.70                80
 09/20/2019   22:52:07   (   0.01,-137.08) (  -0.83,-140.99)  445.08                80
 09/21/2019   22:35:52   (   0.02,-137.06) (   0.17,-136.41)   73.76                80