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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/06/2021   10:59:39   (  -0.01,-137.19) (   0.69,-140.32)  356.85                80
 05/07/2021   10:38:01   (  -0.02,-137.19) (  -0.34,-135.73)  165.77                80
 05/08/2021   23:02:18   (   0.01,-137.19) (  -0.81,-140.95)  428.16                80
 05/09/2021   22:40:40   (   0.01,-137.18) (   0.23,-136.36)   94.32                80
 05/11/2021   11:04:47   (  -0.01,-137.17) (   0.98,-141.53)  497.34                80
 05/12/2021   10:43:10   (  -0.01,-137.16) (  -0.06,-136.94)   24.51                80
 05/14/2021   22:45:48   (   0.01,-137.13) (  -0.11,-137.56)   49.62                80
 05/15/2021   22:29:30   (   0.01,-137.11) (   0.93,-132.97)  471.79                80
 05/17/2021   10:50:59   (  -0.01,-137.08) (   0.21,-138.15)  121.52                80
 05/18/2021   10:29:21   (  -0.01,-137.06) (  -0.83,-133.57)  399.36                80