Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2019   22:25:43   (  -0.00,-137.19) (   0.77,-133.83)  383.78                80
 05/25/2019   10:47:14   (   0.01,-137.21) (   0.42,-139.03)  207.19                80
 05/26/2019   10:25:40   (   0.02,-137.21) (  -0.62,-134.46)  313.63                80
 05/27/2019   22:47:21   (  -0.02,-137.19) (  -0.55,-139.71)  286.97                80
 05/28/2019   22:31:05   (  -0.02,-137.18) (   0.43,-135.13)  233.87                80
 05/30/2019   10:52:38   (   0.02,-137.20) (   0.71,-140.34)  357.68                80
 05/31/2019   10:31:02   (   0.02,-137.20) (  -0.27,-135.76)  162.37                80
 06/01/2019   22:52:44   (  -0.01,-137.15) (  -0.90,-141.01)  440.30                80
 06/02/2019   22:36:29   (  -0.01,-137.14) (   0.14,-136.44)   79.43                80
 06/05/2019   10:36:26   (   0.00,-137.13) (   0.01,-137.08)    5.96                80