Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 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)
 02/22/2021   10:41:30   (  -0.04,-137.21) (  -0.05,-137.03)   19.88                80
 02/24/2021   22:44:11   (   0.02,-137.19) (  -0.07,-137.67)   54.11                80
 02/25/2021   22:27:53   (   0.01,-137.19) (   0.95,-133.08)  468.06                80
 02/27/2021   10:49:21   (  -0.00,-137.18) (   0.25,-138.26)  122.87                80
 02/28/2021   10:27:43   (  -0.01,-137.17) (  -0.77,-133.67)  398.69                80
 03/01/2021   22:49:20   (   0.01,-137.14) (  -0.41,-138.88)  198.74                80
 03/02/2021   22:33:04   (   0.01,-137.13) (   0.66,-134.31)  322.52                80
 03/04/2021   10:54:31   (  -0.01,-137.11) (   0.53,-139.48)  269.67                80
 03/05/2021   10:32:54   (  -0.01,-137.09) (  -0.48,-134.89)  251.03                80