Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 24.  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   22:52:45   (  -0.03,-137.22) (  -0.22,-138.03)   92.50                80
 10/25/2021   22:36:27   (  -0.03,-137.22) (   0.80,-133.43)  431.23                80
 10/27/2021   10:55:13   (   0.02,-137.22) (   0.35,-138.60)  157.62                80
 10/28/2021   10:38:55   (   0.02,-137.22) (  -0.68,-134.01)  365.61                80
 10/29/2021   22:57:51   (  -0.01,-137.21) (  -0.46,-139.22)  229.14                80
 10/30/2021   22:41:32   (  -0.01,-137.21) (   0.57,-134.63)  293.85                80
 11/01/2021   11:00:19   (   0.01,-137.20) (   0.58,-139.80)  295.80                80
 11/02/2021   10:44:00   (   0.01,-137.20) (  -0.44,-135.21)  226.85                80
 11/03/2021   23:02:55   (  -0.01,-137.17) (  -0.74,-140.41)  368.90                80
 11/04/2021   22:46:37   (  -0.01,-137.16) (   0.28,-135.82)  153.32                80
 11/06/2021   11:05:23   (   0.01,-137.14) (   0.87,-140.99)  437.77                80