Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2021   10:39:38   (  -0.01,-137.20) (  -0.26,-135.98)  138.97                80
 05/29/2021   23:03:54   (   0.00,-137.19) (  -0.92,-141.18)  455.58                80
 05/30/2021   22:44:57   (   0.00,-137.19) (   0.12,-136.60)   67.27                80
 06/02/2021   10:47:27   (  -0.00,-137.19) (   0.00,-137.19)    0.84                80
 06/04/2021   22:47:26   (   0.00,-137.18) (  -0.15,-137.81)   72.29                80
 06/05/2021   22:31:08   (   0.00,-137.17) (   0.89,-133.22)  450.17                80
 06/07/2021   10:52:35   (  -0.00,-137.17) (   0.27,-138.40)  140.37                80
 06/08/2021   10:30:58   (  -0.01,-137.16) (  -0.78,-133.81)  381.54                80
 06/09/2021   22:52:34   (   0.01,-137.13) (  -0.41,-139.02)  215.12                80