Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2019   22:31:06   (  -0.00,-137.19) (   0.48,-135.14)  234.01                80
 05/30/2019   10:52:38   (  -0.00,-137.21) (   0.70,-140.34)  357.39                80
 05/31/2019   10:31:03   (  -0.00,-137.20) (  -0.34,-135.78)  163.03                80
 06/01/2019   22:52:44   (   0.00,-137.17) (  -0.83,-141.02)  438.22                80
 06/02/2019   22:36:29   (   0.01,-137.16) (   0.15,-136.44)   81.90                80
 06/05/2019   10:36:26   (  -0.02,-137.16) (  -0.01,-137.08)    8.97                80
 06/07/2019   22:39:13   (   0.02,-137.09) (  -0.12,-137.76)   75.98                80
 06/08/2019   22:22:57   (   0.02,-137.07) (   0.87,-133.18)  443.12                80
 06/10/2019   10:44:29   (  -0.02,-137.07) (   0.26,-138.39)  150.77                80