Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2022   10:42:32   (   0.04,-137.28) (  -0.83,-133.46)  435.37                80
 07/16/2022   23:07:39   (  -0.05,-137.27) (  -0.41,-138.86)  181.66                80
 07/17/2022   22:49:14   (  -0.05,-137.27) (   0.60,-134.41)  326.66                80
 07/19/2022   11:11:31   (   0.05,-137.28) (   0.64,-139.78)  285.04                80
 07/20/2022   10:50:27   (   0.04,-137.28) (  -0.38,-135.32)  222.99                80
 07/21/2022   23:12:54   (  -0.04,-137.27) (  -0.80,-140.74)  395.04                80
 07/22/2022   22:57:09   (  -0.04,-137.27) (   0.16,-136.27)  112.61                80
 07/25/2022   10:58:23   (   0.02,-137.26) (  -0.01,-137.20)    7.19                80
 07/27/2022   23:02:24   (   0.00,-137.22) (  -0.21,-138.15)  106.49                80
 07/28/2022   22:46:40   (   0.02,-137.21) (   0.81,-133.70)  399.89                80