RESPITE: The CASA Toolkit Page: Documentation: Block Library Index: Autocorrelator


Autocorrelator

The Autocorrelator transforms a frame of input data by performing a time-domain autocorrelation along one of its axes.

The name of the dimension to act on if given by the AXIS parameter. If an axis is not specified then, by default, Autocorrelator searches for a dimension called ``TIME". Finally, if there is no ``TIME" dimension it will act on the frame's outermost dimension. After operation the dimension operated on will be renamed ``LAG".

There are a number of parameters that specify exactly how to perform the autocorrelation.

Inputs Meaning Sample 1-D frame 2-D frame >2-D frame
in1 input frame data No Yes Yes No

Outputs Meaning
out1 frame data after autocorrelated

Parameters Type Default Meaning
AXIS String - Name of the axis to operate on
NORMALISE Boolean false Apply normalisation?
WINDOW {RECTANGLE, HAMMING, HANNING, TRIANGLE} RECTANGLE Window Shaping
WINDOW_SIZE Integer - Size of window to employ
MAX_LAG Integer - Maximum lag to compute
VERSION {STAF, MODIFIED_STAF} STAF Type of autocorrelation to perform



Documentation for CTKv1.1.4 - Last modified: Wed Jun 27 16:20:37 BST 2001