Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 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)
 02/22/2021   10:41:30   (  -0.04,-137.21) (  -0.07,-137.04)   19.71                80
 02/24/2021   22:44:11   (   0.03,-137.20) (  -0.05,-137.68)   54.07                80
 02/25/2021   22:27:54   (   0.03,-137.19) (   0.97,-133.09)  468.18                80
 02/27/2021   10:49:21   (  -0.02,-137.18) (   0.22,-138.26)  122.62                80
 02/28/2021   10:27:43   (  -0.02,-137.17) (  -0.79,-133.67)  399.01                80
 03/01/2021   22:49:21   (   0.02,-137.15) (  -0.39,-138.89)  198.23                80
 03/02/2021   22:33:03   (   0.02,-137.14) (   0.63,-134.30)  323.10                80
 03/04/2021   10:54:32   (  -0.02,-137.12) (   0.51,-139.48)  269.03                80
 03/05/2021   10:32:54   (  -0.02,-137.10) (  -0.50,-134.89)  251.71                80
 03/06/2021   22:54:31   (   0.01,-137.06) (  -0.66,-140.11)  346.95                80