params.json Config file documentation

Full documentation of the params.json configuration file

Simulator_params: Simulation parameters

working_directory: Path where results will be saved format: str e.g: "/scratch/users/thatomanamela/Results/testing/"

trecs_params_file: simuCLASS congfig file being used format: str e.g: "stackingdepth2.ini"

msfile_name: Simulated measurement set name format: str e.g: "MeerKAT_3GHz_TRECS_srcs_RA0deg_Dec-30deg.MS"

ra_deg0: Right Ascension at the phase centre of the observation in units of degrees format: float
e.g: 0

"dec_deg0": Declination at the phase centre of the observation in units of degrees format: float e.g: 30

obs_length_hr: Observation length in hours format: int e.g: 1

nchan: 16, # Number of channels "dtime_s": 8, # intergration time in secounds "freq0_MHz": "3000MHz", # observational frequency "dfreq_MHz": "0.209MHz", # integration frequency "SEFD_Jy": 450 # the system equivalent flux densit in Jy },

"Stacking_params":{ # parameters when stacking a certain number of sources to avoid confusion "stacking_depth?": false, # should be kept false when "No._of_srcs_of_choice?" is true "res_element_per_source": 100, # the number of resolution elements per source "im_noise_Jy": 3e-6, # MeerKAT's Full image noise "stacking_depth_skymodel_name": "stack_auto/trecs-simu_truthcat.txt", "FOV_size_cut?": false, # "FOV_size_sqdeg": 0.84, # MeerKAT's FOV size in sq-deg "FOV_size_cut_value": 0.5, # sources will be generated within 50% of the FOV if "FOV_size_cut?" is true "No._of_srcs_of_choice?": true, # when resolutions elements per source is not prefered "No._of_srcs": 10, # flux density of choices provided "No._of_srcs_of_choice?" is true "flux_density_Jy": 1e-6, # flux density of choices provided "No._of_srcs_of_choice?" is true "src_size_arcsec": 0 # when 0 TRECS source sizes are used },

"Imaging_params":{ # Imaging parameters, when removing bright sources before stacking "stack_msfile_name": "uvstacked.ms", # name of the visibility stacked measurement set "imagename": "fullimage", # name the full image of the observation simulation when removing bright sources "niter": 1000, # CLEAN number of interations "threshold": "0.01mJy", # maximum flux density to CLEANout "imsize": 3136, # size of the full image "stampsize": 64, # size of uv stacked image "cell": "1arcsec", # pixel size "stack_clean?": true, # True for removing bright sources "weighting": "briggs", # CLEAN weighting "robust": -0.5 # weighting robust parameters }}