Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/08/2020   22:36:10   (  -0.01,-137.19) (   0.17,-136.36)   94.96                80
 03/10/2020   10:57:40   (   0.00,-137.18) (   1.00,-141.55)  498.43                80
 03/11/2020   10:36:04   (   0.00,-137.17) (  -0.04,-136.98)   22.07                80
 03/13/2020   22:38:48   (  -0.00,-137.14) (  -0.09,-137.64)   56.44                80
 03/14/2020   22:22:32   (  -0.01,-137.12) (   0.90,-133.05)  463.76                80
 03/16/2020   10:44:02   (   0.01,-137.10) (   0.29,-138.24)  130.89                80
 03/17/2020   10:22:27   (   0.01,-137.08) (  -0.75,-133.67)  388.77                80
 03/18/2020   22:44:06   (  -0.01,-137.04) (  -0.40,-138.90)  211.28                80
 03/19/2020   22:27:49   (  -0.01,-137.02) (   0.59,-134.32)  308.22                80
 03/21/2020   10:49:21   (   0.01,-137.00) (   0.55,-139.52)  287.22                80