Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/29/2021   23:03:55   (  -0.00,-137.19) (  -0.91,-141.19)  455.52                80
 05/30/2021   22:42:17   (   0.00,-137.19) (   0.13,-136.60)   67.17                80
 06/02/2021   10:44:47   (   0.00,-137.18) (  -0.00,-137.19)    0.69                80
 06/04/2021   22:47:26   (  -0.00,-137.17) (  -0.14,-137.81)   72.84                80
 06/05/2021   22:31:08   (   0.00,-137.16) (   0.90,-133.22)  449.49                80
 06/07/2021   10:52:36   (  -0.00,-137.15) (   0.26,-138.40)  141.38                80
 06/08/2021   10:30:58   (  -0.00,-137.14) (  -0.78,-133.81)  380.39                80
 06/09/2021   22:52:34   (   0.00,-137.12) (  -0.41,-139.02)  216.29                80
 06/10/2021   22:36:17   (   0.01,-137.11) (   0.63,-134.43)  305.13                80