Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2020   10:58:11   (   0.01,-137.19) (   0.99,-141.45)  486.16                80
 06/14/2020   10:36:35   (   0.01,-137.19) (  -0.07,-136.88)   35.75                80
 06/16/2020   22:39:18   (  -0.00,-137.18) (  -0.08,-137.52)   39.24                80
 06/17/2020   22:23:02   (   0.00,-137.18) (   0.93,-132.94)  482.08                80
 06/19/2020   10:44:32   (  -0.01,-137.17) (   0.19,-138.14)  110.82                80
 06/20/2020   10:22:56   (  -0.01,-137.15) (  -0.82,-133.56)  409.98                80
 06/21/2020   22:44:34   (   0.01,-137.13) (  -0.39,-138.78)  188.33                80
 06/22/2020   22:28:18   (   0.00,-137.12) (   0.68,-134.21)  332.08                80
 06/24/2020   10:49:48   (  -0.00,-137.09) (   0.50,-139.40)  262.21                80
 06/25/2020   10:28:11   (  -0.00,-137.07) (  -0.51,-134.81)  257.70                80
 06/26/2020   22:49:50   (   0.00,-137.04) (  -0.70,-140.03)  341.86                80