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)
 12/01/2023   10:23:30   (   0.02,-137.01) (  -0.35,-135.43)  180.61                80
 12/02/2023   22:45:27   (  -0.01,-137.00) (  -0.82,-140.74)  425.49                80
 12/03/2023   22:29:23   (   0.01,-137.00) (   0.18,-136.21)   90.04                80
 12/06/2023   10:29:48   (  -0.02,-136.99) (  -0.05,-136.96)    5.56                80
 12/08/2023   22:32:59   (   0.02,-136.97) (  -0.14,-137.73)   86.32                80
 12/09/2023   22:16:55   (   0.01,-136.96) (   0.87,-133.19)  428.95                80
 12/11/2023   10:38:42   (   0.00,-136.94) (   0.36,-138.45)  172.82                80
 12/12/2023   10:17:18   (   0.01,-136.92) (  -0.66,-133.92)  341.72                80
 12/13/2023   22:41:54   (  -0.01,-136.88) (  -0.52,-139.23)  266.79                80
 12/14/2023   22:20:30   (  -0.00,-136.86) (   0.51,-134.70)  247.10                80