Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2021   10:34:30   (  -0.00,-137.19) (  -0.54,-134.77)  275.96                80
 05/24/2021   22:58:46   (   0.00,-137.18) (  -0.63,-139.98)  319.36                80
 05/25/2021   22:37:09   (   0.01,-137.17) (   0.41,-135.39)  202.58                80
 05/27/2021   11:01:16   (  -0.00,-137.15) (   0.77,-140.57)  388.98                80
 05/28/2021   10:39:38   (  -0.01,-137.14) (  -0.27,-135.98)  132.39                80
 05/29/2021   23:01:15   (   0.01,-137.11) (  -0.90,-141.19)  464.59                80
 05/30/2021   22:44:57   (   0.01,-137.10) (   0.14,-136.60)   56.75                80
 06/02/2021   10:47:26   (  -0.00,-137.06) (   0.04,-137.18)   14.32                80
 06/04/2021   22:47:25   (   0.00,-137.01) (  -0.17,-137.80)   90.56                80
 06/05/2021   22:31:07   (   0.00,-136.99) (   0.87,-133.22)  430.40                80