Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/25/2019   10:47:14   (  -0.00,-137.21) (   0.43,-139.03)  207.90                80
 05/26/2019   10:25:39   (  -0.00,-137.20) (  -0.61,-134.46)  312.58                80
 05/27/2019   22:47:21   (   0.01,-137.18) (  -0.57,-139.71)  288.12                80
 05/28/2019   22:31:06   (   0.01,-137.18) (   0.47,-135.14)  232.43                80
 05/30/2019   10:52:37   (  -0.01,-137.19) (   0.71,-140.34)  359.49                80
 05/31/2019   10:31:03   (  -0.01,-137.18) (  -0.33,-135.77)  160.29                80
 06/01/2019   22:52:44   (   0.02,-137.14) (  -0.85,-141.02)  442.28                80
 06/02/2019   22:36:30   (   0.02,-137.13) (   0.19,-136.45)   77.28                80
 06/05/2019   10:36:27   (  -0.03,-137.11) (  -0.05,-137.09)    3.20                80
 06/07/2019   22:39:12   (   0.03,-137.02) (  -0.13,-137.76)   83.57                80