Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/11/2020   22:34:02   (  -0.00,-137.18) (   0.19,-136.26)  104.80                80
 06/13/2020   10:58:11   (   0.01,-137.19) (   0.99,-141.45)  486.15                80
 06/14/2020   10:36:36   (   0.01,-137.19) (  -0.08,-136.88)   35.80                80
 06/16/2020   22:39:18   (  -0.00,-137.18) (  -0.08,-137.53)   39.19                80
 06/17/2020   22:23:03   (   0.00,-137.18) (   0.98,-132.96)  482.22                80
 06/19/2020   10:44:32   (  -0.01,-137.17) (   0.20,-138.14)  110.35                80
 06/20/2020   10:22:56   (  -0.01,-137.16) (  -0.81,-133.56)  410.49                80
 06/21/2020   22:44:35   (   0.00,-137.14) (  -0.35,-138.79)  187.90                80
 06/22/2020   22:28:19   (   0.00,-137.13) (   0.66,-134.21)  332.57                80
 06/24/2020   10:49:48   (   0.00,-137.10) (   0.53,-139.39)  261.42                80