MERGE-QUADRANTS

For multi-quadrant data, with identical quadrants as might be produced by overlapping sectors of an autocorrelation spectrometer. This routine determines the offset between any two quadrants in the overlap region, resamples the second quadrant onto the sampling of the first, and then averages them together with some approximate (parabolic) weighting scheme in the overlap region. This process is iterated over all quadrants, to give a single final spectrum; scan header parameters are then modified appropriately.

Relevant flags:

MERGE_OFFSET

L4

If TRUE then minimize offset in overlap.

Examples:

  >> merge-quadrant<CR>
  Are sectors to be offset? (Y/N) [N]<CR>
  Frequency coverage of re-ordered original spectrum


   Quad.   Centre freq.   Increment              Start        End
              (GHz)         (MHz)  (MHz   )     (MHz   )
  -------------------------------------------------------------------

     1     345.608500       0.3125  0.3125   -259.7396    -100.0521
     2     345.733500       0.3125  0.3125   -134.7368      24.9506
     3     345.858500       0.3125  0.3125     -9.7341     149.9534
     4     345.983500       0.3125  0.3125    115.2687     274.9561

  (centre quadrant is           0 )
  Frequency coverage of merged spectrum


   Quad.   Centre freq.   Increment              Start        End
              (GHz)         (MHz)  (MHz   )     (MHz   )
  -------------------------------------------------------------------

     1     345.733500       0.3125  0.3125   -259.7218     274.9657
  ..