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Basic Information on gethd
Task: gethd
Purpose: Print the value of a header item.
Categories: miscellaneous
GetHd simply prints the value of a header item. Its main use will
be in scripts, where it can be used to extract information from
the image header.
Key: in
The name of an item within a dataset. This is given in the form
in=dataset/item
There is no default. The dataset may be either a uv or image data-set.
Key: format
For numeric values, this determines the way that the output value
is converted and formated. Possible values are:
default No conversion. This is the default.
time The value is assumed to be a Julian day, and is formatted
into Miriad's date format.
pol The value is assumed to be a polarization tag, and is
formatted as I,Q,U,V,XX,YY, etc.
The following assume that the value is in radians.
Note that for bpa this assumption is incorrect, it is stored as
degrees and should be retrieved with format left empty.
arcsec The value is converted to arcsec.
arcmin The value is converted to arcmin.
degrees The value is converted to degrees.
hours The value is converted to hours.
hms The value is formatted as hh:mm:ss.
dms The value is formatted as dd:mm:ss.
Key: log
Output log file. Default is the terminal.
Generated by miriad@atnf.csiro.au on 08 Mar 2021