Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 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)
 06/05/2019   10:36:27   (  -0.02,-137.21) (  -0.07,-137.09)   14.82                80
 06/07/2019   22:39:13   (   0.01,-137.18) (  -0.12,-137.76)   65.41                80
 06/08/2019   22:22:58   (   0.00,-137.18) (   0.92,-133.19)  455.36                80
 06/10/2019   10:44:29   (   0.00,-137.19) (   0.26,-138.39)  136.20                80
 06/11/2019   10:22:54   (   0.01,-137.19) (  -0.72,-133.81)  384.07                80
 06/12/2019   22:44:35   (  -0.00,-137.15) (  -0.45,-139.06)  217.90                80
 06/13/2019   22:28:21   (  -0.00,-137.14) (   0.60,-134.49)  302.15                80
 06/15/2019   10:49:53   (  -0.01,-137.15) (   0.53,-139.71)  290.34                80
 06/16/2019   10:28:18   (  -0.01,-137.14) (  -0.45,-135.13)  229.19                80
 06/17/2019   22:49:59   (   0.01,-137.09) (  -0.71,-140.37)  374.11                80