[ Basic Info | References | User Guide ]
Basic Information on gpcopy
Task: gpcopy
Purpose: Copy or merge gains, bandpass and polarization correction.
Categories: calibration
GpCopy is a MIRIAD task which copies or merges calibration corrections
(antenna gains, polarization leakages, frequency table, bandpass item)
from one data-set to another.
Key: vis
The name of the input data-set. This will normally be a visibility
data-set. No default.
Key: out
The name of the output data-set. This is NOT created by GPCOPY, but
rather the relevant items are copied to this data-set.
Key: mode
This determines how the calibration tables, etc, are ``copied''
to the output. The default is to ``copy''. Possible values are:
create Create the output, and copy the calibration tables to it.
copy Copy the calibration tables to the output, overwriting
and previously existing calibration tables. This is the
default.
apply Apply the input calibration tables to the output calibration
tables. This is the sort of operation that you might do
if you have two sets of calibration tables that you wish
to "multiply" together (implemented for gains and bandpass
only).
merge Merge the two calibration tables together. This is the
sort of operation that you will want to perform if you
have two sets of calibration tables which are disjoint in
time (e.g. you used two secondary calibrators). The
merge opertation will weave the two sets of tables together.
(implemented for gain tables only).
Key: options
This gives extra processing options, which are used to suppress
the copying of certain items. Several options can be given,
separated by commands. Minimum match is used:
nopol Do not copy the items dealing with polarization
calibration.
nocal Do not copy the items dealing with antenna gain
calibration.
nopass Do not copy the items dealing with bandpass
calibration (this includes the cgains and wgains tables).