Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2019   10:33:47   (   0.01,-137.21) (  -0.16,-136.41)   91.41                80
 05/17/2019   22:39:14   (  -0.01,-137.18) (   0.03,-137.09)   10.77                80
 05/20/2019   10:41:51   (   0.00,-137.19) (   0.14,-137.72)   60.28                80
 05/21/2019   10:20:16   (   0.00,-137.18) (  -0.90,-133.15)  459.47                80
 05/22/2019   22:41:57   (   0.00,-137.14) (  -0.28,-138.40)  143.57                80
 05/23/2019   22:25:43   (   0.01,-137.13) (   0.76,-133.83)  376.17                80
 05/25/2019   10:47:14   (  -0.01,-137.14) (   0.44,-139.03)  215.78                80
 05/26/2019   10:25:40   (  -0.02,-137.13) (  -0.60,-134.46)  303.47                80
 05/27/2019   22:47:21   (   0.02,-137.07) (  -0.58,-139.71)  300.86                80