Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/28/2021   10:27:44   (  -0.04,-137.22) (  -0.85,-133.68)  403.20                80
 03/01/2021   22:49:22   (   0.04,-137.22) (  -0.33,-138.90)  191.38                80
 03/02/2021   22:33:04   (   0.04,-137.22) (   0.68,-134.31)  331.31                80
 03/04/2021   10:54:33   (  -0.04,-137.21) (   0.45,-139.49)  259.31                80
 03/05/2021   10:32:55   (  -0.04,-137.21) (  -0.56,-134.90)  262.75                80
 03/06/2021   22:54:32   (   0.03,-137.19) (  -0.61,-140.12)  333.41                80
 03/07/2021   22:38:15   (   0.03,-137.18) (   0.40,-135.53)  188.41                80
 03/09/2021   10:59:42   (  -0.02,-137.17) (   0.80,-140.70)  403.11                80
 03/10/2021   10:38:06   (  -0.01,-137.16) (  -0.27,-136.12)  118.50                80
 03/11/2021   22:59:42   (   0.00,-137.14) (  -0.94,-141.33)  478.32                80
 03/12/2021   22:43:25   (   0.00,-137.12) (   0.07,-136.74)   43.21                80