polcal

Carry out crosshand calibration of the data (X and D) on boresight, after parallel hand calibration has been performed

enable

bool

Execute this segment.

label

str, optional, default = pol

Label for this worker and its associated datasets

solve_uvdist

str, optional, default = 100~100000000m

UV cutoff for solver. This should be large enough to wash out RFI

preaverage_time

str, optional, default = 30s

Preaveraging time interval (like 30s) used in solving for X, D and plots

preaverage_freq

int, optional, default = 4

Preaveraging channel interval (like 4) used in solving for X, D and plots

timesol_solfreqsel

str, optional, default = ‘ ‘

Subband selection to be used whenever solving for the DC component of either X or D. This could be picked to avoid RFI

timesol_soltime

str, optional, default = inf

Time solution interval to be used whenever solving for the DC component of either X or D

freqsol_soltime

str, optional, default = inf

Time solution interval to be used when solving for per channel solutions for either X or D. This ought to be as long as possible

feed_angle_rotation

float, optional, default = -90.

Apply feed angle rotation matrix to all stations. MeerKAT X and Y feeds are flipped, so apply a -90 offset here

do_dump_precalibration_leakage_reports

bool, optional, default = False

Write out report estimating residual quadrature leakages prior to crosshand calibration

set_model

Predict model for calibrators into preaveraged dataset

enable

bool, optional, default = True

Execute this segment.

meerkathi_model

bool, optional, default = True

Use model, if available full-sky model, built into southern calibrators database, instead of any NRAO model

threads

int, optional, default = 8

When predicting full sky model (lsm) use these many threads in MeqServer

do_phaseup_crosshand_calibrator

bool, optional, default = True

Phaseup diagonal of calibrator that is used to calibrate crosshand phase prior to solving for slope and offset in crosshand phase

do_solve_crosshand_slope

bool, optional, default = True

Solve for a frequency slope (X-Y digitizer delay) on the crosshand. This requires SNR on the crosshands.

do_solve_crosshand_phase

bool, optional, default = True

Solve for an absolute phase on the crosshand, necessary for polarization angle measurements and to derotate U from V. This requires SNR on the crosshands.

do_solve_leakages

bool, optional, default = True

Solve for leakages from I into U and V. If your calibrator polarization model for your flux scale reference is accurate this shouldalways be enabled.

do_apply_XD

bool, optional, default = True

Apply off-diagonal corrections

do_dump_postcalibration_leakage_reports

bool, optional, default = True

Write out report estimating residual quadrature leakages post crosshand calibration

flagging_summary_crosshand_cal

Summarize data flagged at the end of crosshand calibration

enable

bool, optional, default = True

Execute this segment.