Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 3.  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)
 12/03/2023   22:29:23   (   0.01,-137.00) (   0.16,-136.20)   90.23                80
 12/06/2023   10:29:47   (  -0.02,-136.99) (  -0.03,-136.95)    4.75                80
 12/08/2023   22:32:59   (   0.02,-136.97) (  -0.17,-137.72)   86.33                80
 12/09/2023   22:16:55   (   0.01,-136.96) (   0.84,-133.19)  428.98                80
 12/11/2023   10:38:43   (   0.01,-136.94) (   0.34,-138.46)  172.91                80
 12/12/2023   10:17:19   (   0.01,-136.92) (  -0.67,-133.93)  341.56                80
 12/13/2023   22:39:15   (  -0.01,-136.88) (  -0.51,-139.23)  266.93                80
 12/14/2023   22:20:30   (  -0.00,-136.86) (   0.50,-134.70)  246.91                80
 12/16/2023   10:44:58   (   0.00,-136.83) (   0.72,-139.96)  357.05                80