Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2021   22:50:05   (  -0.01,-137.19) (  -0.16,-137.80)   70.35                80
 06/05/2021   22:28:28   (  -0.00,-137.19) (   0.88,-133.22)  452.28                80
 06/07/2021   10:52:35   (   0.00,-137.18) (   0.27,-138.39)  138.34                80
 06/08/2021   10:30:58   (  -0.00,-137.17) (  -0.77,-133.81)  383.72                80
 06/09/2021   22:52:34   (   0.00,-137.15) (  -0.42,-139.01)  212.14                80
 06/10/2021   22:36:17   (   0.01,-137.14) (   0.62,-134.43)  309.53                80
 06/12/2021   10:57:44   (  -0.01,-137.12) (   0.53,-139.60)  282.53                80
 06/13/2021   10:36:05   (  -0.01,-137.10) (  -0.46,-135.01)  238.68                80
 06/14/2021   22:57:42   (   0.01,-137.07) (  -0.73,-140.21)  358.67                80
 06/15/2021   22:41:24   (   0.01,-137.05) (   0.32,-135.63)  162.34                80