Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/07/2021   10:38:01   (  -0.02,-137.19) (  -0.33,-135.73)  165.78                80
 05/08/2021   23:02:17   (   0.01,-137.18) (  -0.82,-140.94)  428.31                80
 05/09/2021   22:40:40   (   0.01,-137.18) (   0.21,-136.36)   94.02                80
 05/11/2021   11:04:47   (  -0.01,-137.16) (   1.00,-141.52)  497.73                80
 05/12/2021   10:43:10   (  -0.01,-137.15) (  -0.04,-136.94)   24.15                80
 05/14/2021   22:45:49   (   0.01,-137.12) (  -0.08,-137.56)   50.27                80
 05/15/2021   22:29:31   (   0.01,-137.10) (   0.96,-132.98)  470.95                80
 05/17/2021   10:50:58   (  -0.01,-137.07) (   0.24,-138.15)  122.49                80
 05/18/2021   10:29:21   (  -0.01,-137.05) (  -0.80,-133.56)  398.27                80
 05/19/2021   22:50:56   (   0.00,-137.02) (  -0.42,-138.76)  199.05                80
 05/20/2021   22:34:39   (   0.00,-137.00) (   0.62,-134.17)  321.53                80