Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 27.  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)
 11/27/2023   22:39:09   (   0.00,-137.00) (  -0.48,-139.22)  252.06                80
 11/28/2023   22:23:05   (  -0.00,-137.01) (   0.51,-134.68)  264.38                80
 11/30/2023   10:44:54   (   0.01,-137.02) (   0.64,-139.96)  335.42                80
 12/01/2023   10:23:30   (   0.01,-137.01) (  -0.34,-135.43)  180.77                80
 12/02/2023   22:45:27   (  -0.02,-137.00) (  -0.83,-140.74)  425.08                80
 12/03/2023   22:29:23   (  -0.02,-137.00) (   0.17,-136.20)   90.98                80
 12/06/2023   10:29:47   (   0.02,-137.00) (   0.03,-136.94)    6.90                80
 12/08/2023   22:32:59   (  -0.03,-136.98) (  -0.17,-137.72)   84.48                80
 12/09/2023   22:16:55   (  -0.03,-136.97) (   0.83,-133.19)  430.85                80
 12/11/2023   10:38:43   (   0.03,-136.96) (   0.35,-138.46)  170.83                80