Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 30.  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)
 10/31/2023   22:44:55   (   0.00,-137.01) (  -0.78,-140.62)  410.38                80
 11/01/2023   22:28:51   (   0.00,-137.01) (   0.21,-136.09)  105.21                80
 11/03/2023   10:50:41   (  -0.00,-137.01) (   1.00,-141.36)  496.40                80
 11/04/2023   10:29:18   (   0.00,-137.00) (  -0.05,-136.84)   18.97                80
 11/06/2023   22:32:33   (  -0.00,-136.99) (  -0.16,-137.62)   72.48                80
 11/07/2023   22:16:30   (  -0.00,-136.98) (   0.84,-133.09)  442.74                80
 11/09/2023   10:38:20   (   0.00,-136.98) (   0.30,-138.38)  159.47                80
 11/10/2023   10:16:56   (   0.00,-136.97) (  -0.70,-133.85)  355.40                80
 11/11/2023   22:38:55   (  -0.00,-136.95) (  -0.48,-139.17)  252.15                80
 11/12/2023   22:22:51   (  -0.01,-136.94) (   0.53,-134.64)  262.39                80