Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2019   10:25:43   (  -0.00,-137.21) (  -0.64,-134.42)  317.96                80
 04/20/2019   22:47:23   (   0.00,-137.19) (  -0.55,-139.66)  281.81                80
 04/21/2019   22:31:09   (   0.00,-137.18) (   0.48,-135.09)  238.83                80
 04/23/2019   10:52:41   (   0.00,-137.20) (   0.71,-140.30)  353.71                80
 04/24/2019   10:31:06   (   0.00,-137.19) (  -0.32,-135.73)  166.12                80
 04/25/2019   22:52:47   (  -0.01,-137.15) (  -0.88,-140.97)  435.32                80
 04/26/2019   22:36:32   (  -0.02,-137.14) (   0.16,-136.40)   84.79                80
 04/29/2019   10:36:30   (   0.02,-137.14) (  -0.01,-137.04)   11.66                80
 05/01/2019   22:39:16   (  -0.03,-137.08) (  -0.16,-137.71)   72.07                80
 05/02/2019   22:23:01   (  -0.03,-137.06) (   0.88,-133.14)  447.26                80