Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 7 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)
 07/20/2022   10:50:27   (   0.05,-137.29) (  -0.39,-135.32)  224.66                80
 07/21/2022   23:15:34   (  -0.05,-137.29) (  -0.80,-140.74)  392.18                80
 07/22/2022   22:54:29   (  -0.04,-137.29) (   0.17,-136.27)  115.59                80
 07/24/2022   11:19:27   (   0.04,-137.28) (   1.00,-141.65)  498.00                80
 07/25/2022   10:58:21   (   0.03,-137.27) (   0.04,-137.19)    9.49                80
 07/27/2022   23:02:24   (  -0.02,-137.25) (  -0.20,-138.15)  102.30                80
 07/28/2022   22:46:39   (  -0.02,-137.24) (   0.77,-133.69)  404.64                80
 07/30/2022   11:06:16   (   0.03,-137.22) (   0.45,-139.06)  209.87                80
 07/31/2022   10:50:32   (   0.02,-137.20) (  -0.58,-134.60)  296.66                80
 08/01/2022   23:10:18   (  -0.02,-137.18) (  -0.67,-140.01)  322.76                80
 08/02/2022   22:54:33   (  -0.02,-137.16) (   0.36,-135.55)  183.73                80