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CAL_MAIN: additions for antenna-based, solvable, visibility-plane components

CAL_MAIN: additions for antenna-based, solvable, visibility-plane components
Name	Format	Units	Measure	Comments
Columns
Solution statistics
TOTAL_SOLUTION_OK	Bool			Validity of total solution
TOTAL_FIT	Float			Total fit
TOTAL_FIT_WEIGHT	Float			Total fit weight
SOLUTION_OK	Bool(a)			Solution validity mask
FIT	Float(a)			Fit array
FIT_WEIGHT	Float(a)			Fit weight array

Notes:

(i) The dimension (a) of the array-based columns is: (N_jones, N_jones, N_spw, N_chan). These dimensions are defined in the CAL_DESC sub-table, and can vary by row.

TOTAL_SOLUTION_OK

False if the current calibration solution interval is flagged, else True.

TOTAL_FIT

Total fit for the solution interval as a whole, as $\sqrt{{\chi^2}\over{\Sigma {\rm weight}}}$.

TOTAL_FIT_WEIGHT

Total fit weight for the solution interval as a whole ($\Sigma$weight).

SOLUTION_OK

Validity mask for each element of the calibration solution array, of dimension (a).

FIT

Fit for each element of the calibration solution array, of dimension (a), as defined in the TOTAL_FIT_WEIGHT description above.

FIT_WEIGHT

Fit weight for each element of the calibration solution array, of dimension (a).