Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/24/2021   22:52:46   (  -0.03,-137.22) (  -0.20,-138.03)   92.58                80
 10/25/2021   22:36:27   (  -0.03,-137.22) (   0.82,-133.44)  431.14                80
 10/27/2021   10:55:13   (   0.02,-137.23) (   0.33,-138.61)  157.66                80
 10/28/2021   10:38:55   (   0.02,-137.22) (  -0.70,-134.02)  365.56                80
 10/29/2021   22:57:50   (  -0.01,-137.21) (  -0.49,-139.22)  229.21                80
 10/30/2021   22:41:33   (  -0.01,-137.21) (   0.59,-134.64)  293.82                80
 11/01/2021   11:00:18   (   0.01,-137.20) (   0.62,-139.79)  295.82                80
 11/02/2021   10:44:01   (   0.01,-137.20) (  -0.46,-135.21)  226.87                80
 11/03/2021   23:02:56   (  -0.01,-137.18) (  -0.72,-140.42)  368.91                80
 11/04/2021   22:46:37   (  -0.01,-137.16) (   0.31,-135.82)  153.32                80