Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/16/2021   10:57:57   (  -0.03,-137.22) (   0.67,-140.40)  362.90                80
 02/17/2021   10:36:19   (  -0.03,-137.21) (  -0.34,-135.81)  159.32                80
 02/18/2021   22:57:56   (   0.03,-137.21) (  -0.84,-141.03)  436.27                80
 02/19/2021   22:41:40   (   0.03,-137.20) (   0.22,-136.45)   85.63                80
 02/22/2021   10:41:30   (  -0.01,-137.17) (  -0.04,-137.03)   14.86                80
 02/24/2021   22:44:10   (  -0.01,-137.12) (  -0.13,-137.66)   61.12                80
 02/25/2021   22:27:52   (  -0.01,-137.11) (   0.88,-133.07)  459.58                80
 02/27/2021   10:49:21   (   0.00,-137.07) (   0.26,-138.25)  134.22                80
 02/28/2021   10:27:43   (   0.00,-137.05) (  -0.75,-133.66)  386.10                80