Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 4.  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)
 12/06/2023   10:29:47   (   0.00,-137.00) (  -0.02,-136.95)    6.54                80
 12/08/2023   22:32:59   (  -0.01,-136.99) (  -0.18,-137.72)   83.62                80
 12/09/2023   22:16:54   (  -0.01,-136.98) (   0.83,-133.18)  431.95                80
 12/11/2023   10:38:43   (   0.01,-136.97) (   0.35,-138.46)  169.79                80
 12/12/2023   10:17:18   (   0.02,-136.95) (  -0.67,-133.93)  345.11                80
 12/13/2023   22:39:15   (  -0.02,-136.92) (  -0.51,-139.23)  262.71                80
 12/14/2023   22:23:09   (  -0.03,-136.90) (   0.45,-134.69)  251.66                80
 12/16/2023   10:44:57   (   0.03,-136.87) (   0.71,-139.96)  351.62                80
 12/17/2023   10:23:33   (   0.03,-136.85) (  -0.32,-135.43)  162.38                80