Description
simulator provides a unified interface for simulation of
telescope processing. It can create a MeasurementSet from scratch or
read in an existing MeasurementSet, it can predict synthesis data onto
the (u,v) coordinates or single dish data onto (ra,dec) points, and it
can corrupt this data through Gaussian errors or through specific
errors residing in (anti-) calibration tables.
simulator changes some columns to the MeasurementSet to store
results of processing. The following columns in the MS are
particularly important:
- DATA
- The original observed visibilities are in a column
called DATA. These are normally not altered by any processing in
AIPS++. However, this simulation program does overwrite these
values.
- CORRECTED_DATA
- During a calibration process, as carried out by
e.g. calibrater, the visibilities may be
corrected for calibration effects. This corrected visibilities are
stored in a column CORRECTED_DATA which is created on demand.
- MODEL_DATA
- During various phases of processing, the
visibilities as predicted from some model are required. These
model visibilities are stored in a column MODEL_DATA. The
ft function of the imager
tool should be used to calculate the model visibility for a
model image or componentmodels.
Standard tools such as the table module and the
ms can be used to access and possibly change these (and
all other) columns.
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