Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 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)
 11/01/2023   22:28:51   (  -0.01,-137.01) (   0.18,-136.08)  105.53                80
 11/03/2023   10:50:41   (   0.01,-137.01) (   0.98,-141.36)  496.39                80
 11/04/2023   10:29:18   (   0.01,-137.00) (  -0.01,-136.83)   18.97                80
 11/06/2023   22:32:33   (  -0.00,-136.99) (  -0.14,-137.63)   72.73                80
 11/07/2023   22:16:30   (  -0.00,-136.98) (   0.85,-133.10)  442.40                80
 11/09/2023   10:38:20   (   0.00,-136.97) (   0.29,-138.38)  160.02                80
 11/10/2023   10:16:57   (   0.00,-136.96) (  -0.71,-133.85)  354.78                80
 11/11/2023   22:38:55   (  -0.00,-136.94) (  -0.48,-139.17)  252.82                80
 11/12/2023   22:22:52   (  -0.00,-136.93) (   0.53,-134.64)  261.58                80
 11/14/2023   10:44:41   (   0.00,-136.91) (   0.67,-139.91)  342.23                80
 11/15/2023   10:23:17   (   0.00,-136.89) (  -0.34,-135.39)  171.40                80