Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2020   10:26:06   (   0.06,-137.17) (  -0.66,-134.08)  353.26                80
 09/08/2020   22:47:44   (  -0.06,-137.20) (  -0.50,-139.31)  239.45                80
 09/09/2020   22:31:28   (  -0.05,-137.22) (   0.52,-134.72)  284.52                80
 09/11/2020   10:52:57   (   0.05,-137.24) (   0.68,-139.91)  304.55                80
 09/12/2020   10:31:22   (   0.05,-137.25) (  -0.40,-135.34)  218.76                80
 09/13/2020   22:53:00   (  -0.04,-137.26) (  -0.76,-140.57)  375.88                80
 09/14/2020   22:36:44   (  -0.03,-137.27) (   0.26,-135.98)  147.06                80
 09/16/2020   10:58:14   (   0.02,-137.29) (   0.87,-141.18)  443.12                80
 09/17/2020   10:36:37   (   0.03,-137.29) (  -0.15,-136.60)   79.58                80
 09/19/2020   22:41:59   (  -0.03,-137.30) (   0.01,-137.25)    6.79                80