Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 1.  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)
 12/02/2023   22:45:27   (  -0.01,-137.00) (  -0.82,-140.74)  425.25                80
 12/03/2023   22:29:23   (   0.01,-137.00) (   0.17,-136.20)   90.20                80
 12/06/2023   10:29:47   (  -0.02,-136.99) (  -0.04,-136.95)    5.13                80
 12/08/2023   22:32:59   (   0.02,-136.97) (  -0.15,-137.72)   86.22                80
 12/09/2023   22:16:55   (   0.01,-136.96) (   0.86,-133.19)  429.08                80
 12/11/2023   10:38:42   (   0.01,-136.94) (   0.37,-138.45)  172.79                80
 12/12/2023   10:17:18   (   0.01,-136.92) (  -0.65,-133.92)  341.74                80
 12/13/2023   22:39:14   (  -0.01,-136.88) (  -0.53,-139.22)  266.68                80
 12/14/2023   22:20:29   (  -0.00,-136.86) (   0.49,-134.70)  247.18                80