Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2019   10:44:34   (   0.00,-137.21) (   0.28,-138.35)  131.13                80
 05/05/2019   10:23:00   (   0.00,-137.21) (  -0.76,-133.79)  389.68                80
 05/06/2019   22:44:41   (  -0.00,-137.18) (  -0.40,-139.03)  210.58                80
 05/07/2019   22:28:25   (  -0.00,-137.18) (   0.58,-134.45)  309.93                80
 05/09/2019   10:49:58   (   0.00,-137.19) (   0.58,-139.67)  282.63                80
 05/10/2019   10:28:23   (  -0.00,-137.18) (  -0.46,-135.10)  236.96                80
 05/11/2019   22:50:05   (   0.00,-137.14) (  -0.70,-140.35)  365.48                80
 05/12/2019   22:33:49   (   0.00,-137.13) (   0.28,-135.77)  154.20                80
 05/14/2019   10:55:21   (  -0.00,-137.13) (   0.87,-140.98)  438.63                80
 05/15/2019   10:33:47   (  -0.00,-137.12) (  -0.16,-136.41)   80.50                80
 05/17/2019   22:36:33   (   0.01,-137.05) (  -0.01,-137.08)    4.50                80