purify1

Usage

Overview

PURIFY is a tool for radio interferometric imaging including file handling (for both visibilities and fits files), implementation of the measurement operator and set-up of the different optimization problems used for image deconvolution.

The code is given for educational purpose. The code is in beta and still under development.

Options

--measurement_set

Path of measurement set. (required)

--name

Path of file output. (required)

--noise

Path of measurement_set with Stokes V noise estimate. (Assumes Stokes V of measurement set).

--niters

Number of iterations.

--stokes

Choice of stokes I, Q, U, or V (I is default).

--cellsize

Size of a pixel in arcseconds.

--size

Image size in pixels.

--width

Image width in pixels.

--height

Image height in pixels.

--beta

Values used to set the stepsize of PADMM

--noadapt

Choose not to update the stepsize.

--diagnostic

Save diagnostic information to log file.

--l2_bound

Factor to multiply the l2 bound by.

--relative_variation

Convergence criteria on relative variation (default is 1e-3).

--residual_convergence

Factor to multiply the l2 bound by for convergence. (default is 1)

--relative_gamma_adapt

Relative difference criteria for adapting the stepsize gamma (default 0.01).

--power_iterations

Maximum iterations for the power method.

--primary_beam

Choice of primary beam model. (none is the only option).

--fft_grid_correction

Choose calculate the gridding correction using an FFT rather than analytic formula.

--kernel

Type of gridding kernel to use, kb, gauss, pswf, box. (kb is default)

--kernel_support

Support of kernel in grid cells. (4 is the default)

--logging_level

Determines the output logging level for sopt and purify. ("debug" is the default)

--help

Print usage information.