Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/26/2019   10:25:39   (   0.01,-137.20) (  -0.58,-134.45)  312.87                80
 05/27/2019   22:47:20   (  -0.02,-137.18) (  -0.60,-139.70)  287.66                80
 05/28/2019   22:31:06   (  -0.02,-137.17) (   0.44,-135.13)  232.92                80
 05/30/2019   10:52:37   (   0.02,-137.19) (   0.75,-140.33)  359.21                80
 05/31/2019   10:31:02   (   0.02,-137.18) (  -0.29,-135.77)  160.53                80
 06/01/2019   22:52:44   (   0.01,-137.13) (  -0.88,-141.01)  442.55                80
 06/02/2019   22:36:29   (   0.01,-137.12) (   0.16,-136.44)   76.87                80
 06/05/2019   10:36:26   (  -0.01,-137.10) (  -0.01,-137.08)    2.31                80
 06/07/2019   22:39:12   (  -0.00,-137.01) (  -0.18,-137.75)   83.66                80
 06/08/2019   22:22:57   (  -0.01,-136.99) (   0.86,-133.18)  434.90                80