The concept of A
SSOCIATED A
RRAYS is being added in the
CLASS data format. It
is an additional section that will store a set of data arrays whose
spectral axis matches the brightness spectral axis,
i.e., one-to-one
channel correspondance. At start, this will be used in two
contexts. For Herschel/HIFI, it will store a logical array of
blanked channels and a logical array to define the channels where
the lines appear (see IRAM Memo 2015-3). At some point, it will be
used at the IRAM-30m to store the results of the calibration scans,
i.e., the sky counts in the
RY array and the hot/cold counts,
and the receiver, system, and calibration temperatures in a set of A
SSOCIATED A
RRAYS.
This document introduces the detailed specifications of the concept
of an ASSOCIATED ARRAY, its implementation/integration in CLASS, and it
gives an example of use, namely how to baseline a spectra using a
LINE associated array to define the baseline windows. The
specifications of the ASSOCIATED ARRAYS is foreseen to evolve following feedback
from its use at IRAM and elsewhere.
Keywords: CLASS Data Format
Related documents: CLASS documentation, Importing Herschel-FITS
into CLASS