Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/20/2020   10:22:56   (   0.01,-137.20) (  -0.83,-133.56)  415.68                80
 06/21/2020   22:47:15   (  -0.01,-137.21) (  -0.33,-138.79)  180.08                80
 06/22/2020   22:25:39   (   0.00,-137.21) (   0.68,-134.21)  341.78                80
 06/24/2020   10:49:48   (   0.00,-137.20) (   0.50,-139.40)  250.20                80
 06/25/2020   10:28:11   (  -0.00,-137.20) (  -0.51,-134.81)  271.34                80
 06/26/2020   22:52:31   (  -0.01,-137.19) (  -0.65,-140.04)  325.38                80
 06/27/2020   22:30:54   (  -0.00,-137.19) (   0.36,-135.46)  195.96                80
 06/29/2020   10:55:05   (   0.01,-137.17) (   0.77,-140.66)  396.96                80
 06/30/2020   10:33:28   (   0.00,-137.16) (  -0.24,-136.08)  123.83                80
 07/01/2020   22:55:07   (   0.00,-137.15) (  -0.91,-141.31)  474.24                80
 07/02/2020   22:38:51   (   0.01,-137.13) (   0.10,-136.73)   46.17                80