Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 11/30/2023   10:44:54   (  -0.00,-137.01) (   0.66,-139.96)  335.82                80
 12/01/2023   10:23:30   (   0.00,-137.01) (  -0.33,-135.43)  180.27                80
 12/02/2023   22:45:27   (  -0.01,-137.00) (  -0.84,-140.73)  425.43                80
 12/03/2023   22:29:22   (  -0.01,-137.00) (   0.15,-136.20)   90.59                80
 12/06/2023   10:29:47   (   0.01,-137.00) (  -0.02,-136.95)    6.52                80
 12/08/2023   22:32:59   (  -0.02,-136.97) (  -0.18,-137.72)   85.18                80
 12/09/2023   22:16:55   (  -0.02,-136.96) (   0.83,-133.19)  430.09                80
 12/11/2023   10:38:43   (   0.03,-136.95) (   0.34,-138.46)  171.91                80
 12/12/2023   10:17:18   (   0.03,-136.93) (  -0.67,-133.93)  342.69                80
 12/13/2023   22:39:14   (  -0.04,-136.89) (  -0.57,-139.22)  265.72                80