Summary

accum will interpolate and extrapolate a temporal calibration table onto a new table that has a regularly-space time grid. The first run of accum defines the time grid and fills this table with the results from the input table. Subsequent use of accum will combine additional calibration tables onto the same grid of the initial accum table to obtain an output accum table. 

Parameter descriptions

vis

Name of input MeasurementSet. No default.

tablein

Input cumulative calibration table. Default: ''  means none. On first execution of accum, tablein=''  and accumtime is used to generate tablein with the specified time gridding.

tablein expandable parameters

accumtime

The time separation when making tablein. Default: 1.0  (1 second). This time should not be less than the visibiility sampling time, but should be less than about 30% of a typical scan length.

incrtable

The calibration data to be interpolated onto the tablein file. Default: ''. Must be specified.

caltable 

The output cumulative calibration file. Default: ''  means use tablein as the output file.

field

Standard field ID or name selection for tablein to process. Default: '' = all fields. (See Data Selection in a MeasurementSet for more details.)

calfield

Select field(s) from incrtable to process. Default: '' = all fields. (See Data Selection in a MeasurementSet for more details.) 

interp

Interpolation type (in time,freq) to use for each gaintable. When frequency interpolation is relevant (B, Df, Xf), separate time-dependent and freq-dependent interp types with a comma (freq interp type should be after the comma). Specifications for frequency are ignored when the calibration table has no channel-dependence. Time-dependent interp options ending in 'PD' enable a "phase delay" correction per spw for non-channel-dependent calibration types. For multi-obsId datasets, 'perobs' can be appended to the time-dependent interpolation specification to enforce obs ID boundaries when interpolating in time. Options: Time - 'nearest', 'linear'; Freq - 'nearest', 'linear', 'cubic', 'spline'. Default: 'linear,linear' for all gaintable(s). See also: Solving for Calibration.

spwmap

Spectral windows combinations to form gaintable(s). Default: [ ] (apply solutions from each spw to that spw only). See also: Solving for Calibration.