Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2019   10:52:41   (   0.00,-137.21) (   0.70,-140.30)  352.49                80
 04/24/2019   10:31:07   (   0.00,-137.20) (  -0.33,-135.73)  167.74                80
 04/25/2019   22:52:47   (  -0.00,-137.18) (  -0.87,-140.97)  432.58                80
 04/26/2019   22:36:32   (  -0.00,-137.17) (   0.16,-136.40)   87.84                80
 04/29/2019   10:36:30   (   0.00,-137.17) (  -0.01,-137.04)   14.93                80
 05/01/2019   22:39:17   (  -0.00,-137.13) (  -0.11,-137.72)   67.26                80
 05/02/2019   22:23:02   (  -0.00,-137.12) (   0.87,-133.14)  452.53                80
 05/04/2019   10:44:34   (  -0.00,-137.12) (   0.31,-138.35)  141.12                80
 05/05/2019   10:22:59   (  -0.00,-137.10) (  -0.73,-133.78)  377.66                80
 05/06/2019   22:44:41   (   0.01,-137.04) (  -0.42,-139.03)  226.33                80