Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/24/2021   22:44:10   (   0.03,-137.20) (  -0.10,-137.67)   53.87                80
 02/25/2021   22:27:54   (   0.03,-137.19) (   0.97,-133.09)  468.37                80
 02/27/2021   10:49:21   (  -0.02,-137.19) (   0.22,-138.26)  122.37                80
 02/28/2021   10:27:44   (  -0.02,-137.18) (  -0.79,-133.67)  399.29                80
 03/01/2021   22:49:21   (   0.02,-137.15) (  -0.38,-138.89)  197.93                80
 03/02/2021   22:33:03   (   0.02,-137.14) (   0.63,-134.30)  323.43                80
 03/04/2021   10:54:32   (  -0.02,-137.12) (   0.51,-139.48)  268.64                80
 03/05/2021   10:32:54   (  -0.02,-137.11) (  -0.50,-134.89)  252.13                80
 03/06/2021   22:54:32   (   0.01,-137.07) (  -0.66,-140.11)  346.52                80
 03/07/2021   22:38:14   (   0.00,-137.05) (   0.35,-135.52)  174.02                80