Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/29/2021   22:57:51   (  -0.02,-137.22) (  -0.46,-139.22)  227.52                80
 10/30/2021   22:41:32   (  -0.02,-137.22) (   0.57,-134.63)  295.77                80
 11/01/2021   11:00:19   (   0.01,-137.22) (   0.57,-139.80)  294.02                80
 11/02/2021   10:44:00   (   0.02,-137.21) (  -0.45,-135.20)  228.92                80
 11/03/2021   23:02:55   (  -0.01,-137.20) (  -0.74,-140.41)  365.93                80
 11/04/2021   22:46:37   (  -0.02,-137.19) (   0.29,-135.81)  156.57                80
 11/06/2021   11:05:23   (   0.01,-137.17) (   0.85,-140.98)  434.61                80
 11/07/2021   10:49:05   (   0.01,-137.15) (  -0.17,-136.39)   87.14                80
 11/09/2021   22:51:42   (  -0.01,-137.10) (   0.02,-137.00)   11.80                80