Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2019   22:36:29   (   0.00,-137.18) (   0.17,-136.45)   84.21                80
 06/05/2019   10:36:26   (  -0.01,-137.20) (  -0.03,-137.08)   12.91                80
 06/07/2019   22:39:13   (   0.02,-137.15) (  -0.10,-137.76)   69.00                80
 06/08/2019   22:22:57   (   0.01,-137.14) (   0.88,-133.18)  451.12                80
 06/10/2019   10:44:30   (  -0.00,-137.15) (   0.25,-138.40)  141.45                80
 06/11/2019   10:22:54   (   0.00,-137.14) (  -0.74,-133.82)  378.19                80
 06/12/2019   22:44:36   (   0.00,-137.09) (  -0.43,-139.06)  224.71                80
 06/13/2019   22:28:20   (   0.01,-137.08) (   0.56,-134.48)  294.71                80
 06/15/2019   10:49:52   (  -0.01,-137.08) (   0.57,-139.70)  298.74                80