Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 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)
 11/08/2021   23:08:00   (  -0.01,-137.20) (  -0.98,-141.59)  499.37                80
 11/09/2021   22:51:41   (  -0.02,-137.20) (   0.05,-137.00)   24.12                80
 11/12/2021   10:51:28   (   0.01,-137.20) (   0.09,-137.56)   41.33                80
 11/13/2021   10:35:10   (   0.01,-137.20) (  -0.95,-132.97)  481.99                80
 11/14/2021   22:54:04   (  -0.01,-137.19) (  -0.26,-138.17)  112.50                80
 11/15/2021   22:37:45   (  -0.01,-137.18) (   0.79,-133.57)  410.81                80
 11/17/2021   10:56:31   (   0.01,-137.18) (   0.38,-138.74)  178.26                80
 11/18/2021   10:40:12   (   0.01,-137.17) (  -0.67,-134.15)  344.66                80
 11/19/2021   22:59:07   (  -0.01,-137.15) (  -0.50,-139.34)  250.69                80
 11/20/2021   22:42:48   (  -0.01,-137.13) (   0.56,-134.76)  271.76                80