Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 22.  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   (  -0.01,-137.21) (   0.68,-140.30)  352.74                80
 04/24/2019   10:31:07   (  -0.00,-137.20) (  -0.35,-135.73)  167.74                80
 04/25/2019   22:52:47   (   0.00,-137.18) (  -0.85,-140.97)  432.58                80
 04/26/2019   22:36:33   (  -0.00,-137.17) (   0.18,-136.40)   87.95                80
 04/29/2019   10:36:31   (   0.00,-137.18) (  -0.03,-137.05)   15.16                80
 05/01/2019   22:39:16   (   0.00,-137.13) (  -0.14,-137.72)   66.94                80
 05/02/2019   22:23:02   (   0.00,-137.12) (   0.89,-133.15)  452.80                80
 05/04/2019   10:44:34   (  -0.01,-137.12) (   0.28,-138.36)  140.93                80
 05/05/2019   10:23:00   (  -0.01,-137.11) (  -0.75,-133.79)  377.91                80