Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2021   10:44:47   (   0.00,-137.18) (  -0.00,-137.19)    1.16                80
 06/04/2021   22:47:26   (  -0.00,-137.16) (  -0.14,-137.81)   73.55                80
 06/05/2021   22:31:08   (  -0.00,-137.15) (   0.90,-133.22)  448.64                80
 06/07/2021   10:52:34   (   0.00,-137.14) (   0.31,-138.38)  142.71                80
 06/08/2021   10:30:57   (  -0.00,-137.13) (  -0.73,-133.80)  378.94                80
 06/09/2021   22:52:33   (   0.00,-137.10) (  -0.45,-139.01)  217.76                80
 06/10/2021   22:36:16   (   0.01,-137.09) (   0.59,-134.42)  303.51                80
 06/12/2021   10:57:43   (  -0.01,-137.06) (   0.56,-139.60)  289.12                80
 06/13/2021   10:36:06   (  -0.01,-137.04) (  -0.49,-135.01)  231.68                80