Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/30/2019   10:52:37   (   0.00,-137.18) (   0.72,-140.34)  359.79                80
 05/31/2019   10:31:03   (  -0.00,-137.17) (  -0.32,-135.77)  159.96                80
 06/01/2019   22:52:44   (   0.01,-137.14) (  -0.85,-141.02)  442.01                80
 06/02/2019   22:36:29   (   0.01,-137.13) (   0.19,-136.45)   77.64                80
 06/05/2019   10:36:25   (  -0.01,-137.10) (   0.01,-137.07)    3.88                80
 06/07/2019   22:39:12   (   0.00,-137.02) (  -0.13,-137.75)   82.44                80
 06/08/2019   22:22:57   (  -0.01,-137.00) (   0.85,-133.17)  436.27                80
 06/10/2019   10:44:28   (   0.00,-136.99) (   0.33,-138.38)  158.77                80
 06/11/2019   10:22:54   (   0.01,-136.96) (  -0.72,-133.81)  359.41                80
 06/12/2019   22:44:34   (  -0.00,-136.89) (  -0.50,-139.05)  245.68                80