Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2020   10:48:14   (   0.03,-137.18) (   0.52,-139.48)  261.66                80
 08/22/2020   10:31:57   (   0.03,-137.18) (  -0.49,-134.90)  259.89                80
 08/23/2020   22:50:54   (  -0.03,-137.17) (  -0.71,-140.12)  336.51                80
 08/24/2020   22:34:38   (  -0.03,-137.16) (   0.31,-135.54)  184.63                80
 08/26/2020   10:53:28   (   0.03,-137.14) (   0.85,-140.73)  409.40                80
 08/27/2020   10:37:12   (   0.02,-137.13) (  -0.17,-136.15)  111.18                80
 08/28/2020   22:56:10   (   0.00,-137.11) (  -0.97,-141.38)  487.22                80
 08/29/2020   22:39:54   (   0.01,-137.09) (   0.04,-136.80)   33.24                80
 09/01/2020   10:39:47   (  -0.00,-137.05) (   0.09,-137.41)   41.29                80
 09/02/2020   10:23:31   (  -0.00,-137.03) (  -0.93,-132.83)  478.98                80
 09/03/2020   22:42:29   (   0.00,-137.01) (  -0.21,-138.06)  119.37                80