Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2020   10:48:47   (   0.03,-137.19) (   0.44,-139.04)  210.10                80
 08/01/2020   10:29:51   (   0.01,-137.19) (  -0.57,-134.45)  310.98                80
 08/02/2020   22:48:49   (   0.02,-137.17) (  -0.58,-139.68)  286.84                80
 08/03/2020   22:32:34   (   0.01,-137.17) (   0.50,-135.11)  234.56                80
 08/05/2020   10:51:23   (  -0.01,-137.16) (   0.72,-140.29)  358.17                80
 08/06/2020   10:35:07   (  -0.01,-137.15) (  -0.35,-135.72)  163.06                80
 08/07/2020   22:54:05   (   0.00,-137.13) (  -0.85,-140.94)  434.47                80
 08/08/2020   22:37:48   (   0.00,-137.12) (   0.17,-136.36)   86.50                80
 08/11/2020   10:40:22   (  -0.00,-137.09) (  -0.02,-136.97)   13.40                80