Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/09/2020   10:31:19   (   0.00,-137.18) (  -0.37,-135.62)  178.67                80
 06/10/2020   22:55:39   (  -0.00,-137.20) (  -0.79,-140.85)  414.96                80
 06/11/2020   22:34:02   (  -0.00,-137.22) (   0.21,-136.27)  108.70                80
 06/13/2020   10:58:11   (   0.01,-137.25) (   0.97,-141.46)  480.03                80
 06/14/2020   10:36:36   (   0.00,-137.26) (  -0.10,-136.88)   43.30                80
 06/16/2020   22:39:19   (   0.00,-137.29) (  -0.06,-137.53)   28.27                80
 06/17/2020   22:23:03   (   0.00,-137.29) (   1.00,-132.96)  494.55                80
 06/19/2020   10:44:33   (  -0.01,-137.31) (   0.18,-138.15)   95.75                80
 06/20/2020   10:22:56   (  -0.01,-137.31) (  -0.82,-133.56)  426.46                80
 06/21/2020   22:44:35   (   0.00,-137.31) (  -0.33,-138.80)  169.92                80
 06/22/2020   22:28:19   (   0.00,-137.31) (   0.67,-134.21)  351.96                80