Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 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)
 07/01/2019   10:47:07   (  -0.02,-137.21) (   0.40,-139.05)  209.92                80
 07/02/2019   10:25:32   (  -0.02,-137.20) (  -0.64,-134.48)  310.54                80
 07/03/2019   22:47:13   (   0.02,-137.18) (  -0.55,-139.72)  290.05                80
 07/04/2019   22:30:57   (   0.01,-137.17) (   0.44,-135.14)  230.17                80
 07/06/2019   10:49:50   (  -0.01,-137.17) (   0.71,-140.35)  363.14                80
 07/07/2019   10:33:35   (  -0.00,-137.16) (  -0.34,-135.79)  156.76                80
 07/08/2019   22:52:35   (   0.01,-137.12) (  -0.84,-141.03)  444.83                80
 07/09/2019   22:36:20   (   0.00,-137.11) (   0.15,-136.45)   74.89                80
 07/12/2019   10:36:17   (  -0.01,-137.09) (   0.01,-137.08)    2.26                80