Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 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)
 10/03/2021   22:51:22   (  -0.03,-137.21) (  -0.17,-137.87)   74.18                80
 10/04/2021   22:35:04   (  -0.03,-137.21) (   0.84,-133.27)  449.21                80
 10/06/2021   10:53:50   (   0.03,-137.21) (   0.33,-138.44)  140.60                80
 10/07/2021   10:37:32   (   0.03,-137.21) (  -0.74,-133.86)  382.46                80
 10/08/2021   22:56:28   (  -0.03,-137.20) (  -0.45,-139.06)  212.19                80
 10/09/2021   22:40:09   (  -0.03,-137.19) (   0.57,-134.46)  310.23                80
 10/11/2021   10:58:55   (   0.03,-137.17) (   0.60,-139.63)  281.24                80
 10/12/2021   10:42:37   (   0.03,-137.15) (  -0.42,-135.04)  240.56                80
 10/13/2021   23:01:33   (  -0.02,-137.13) (  -0.71,-140.25)  355.88                80
 10/14/2021   22:45:15   (  -0.02,-137.11) (   0.31,-135.66)  165.71                80
 10/16/2021   11:04:01   (   0.01,-137.09) (   0.85,-140.83)  426.42                80