woden_settings

Tests for the functions in WODEN/src/woden_settings.c. These functions handle reading input simulation settings from a .json file, and filling a woden_settings_t struct based on them. woden_settings_t is passed around by most functions internally to WODEN to tell them what to do.

test_read_json_settings.c

Tests the function woden_settings::read_json_settings. This function reads in the simulation settings held in a .json file (usually written by run_woden.py). This test runs reads multiple .json files in, each with different settings. All test .json files share these common core settings:

{
"ra0": 0.0000000000,
"dec0": -27.0000000000,
"num_freqs": 16,
"num_time_steps": 4,
"cat_filename": "srclist_singlepoint.txt",
"time_res": 2.0,
"frequency_resolution": 40000.0,
"chunking_size": 5000,
"jd_date": 2457278.2010995,
"LST": 0.44312771,
"array_layout": "example_array_layout.txt",
"lowest_channel_freq": 1.6703500000e+08,
"latitude": -26.70331944,
"coarse_band_width": 1.2800000000e+06,
"sky_crop_components": "True",
"band_nums": [1,4,9]
}

For all tests, these core attributes are tested as being read in correctly into woden_settings_t after calling read_json_settings. The test files listed in this table are all run to test different simulation setups and eventualities.

run_woden_nobeam.json	The NO_BEAM primary beam is selected
run_woden_EDA2.json	The ANALY_DIPOLE primary beam is selected
run_woden_gaussian_bespoke.json	The GAUSSIAN primary beam is selected, using input values to set the FWHM and reference frequency
run_woden_gaussian_default.json	The GAUSSIAN primary beam is selected, using default values for the FWHM and reference frequency
run_woden_MWAFEE.json	The MWA_FEE primary beam is selected, and associated delays and path to hdf5 file are read in correctly
run_woden_MWAFEE_interp.json	The frequency interpolated MWA_FEE primary beam is selected, and associated delays and path to hdf5 file are read in correctly
run_woden_MWA_analy.json	The analytic MWA_primary beam is selected, and associated delays are read in correctly
run_woden_MWAFEE_baddelay.json	Contains a bad set of MWA FEE delays and should throw an error
run_woden_MWAFEE_nopath.json	Has no path to the MWA FEE hdf5 file so should throw an error
run_woden_multiple_beams.json	Contains multiple primary beam selections so should throw an error
run_woden_noprecession.json	Checks that precession is switched off if requested

test_setup_lsts_and_phase_centre.c

Tests woden_settings::setup_lsts_and_phase_centre which uses the input simulation parameters to calculate the sine and cosine of the declination of the phase centre, and the LST at the centre of every time integration. Runs three tests, two with \(\mathrm{Dec}_{\mathrm{phase}} = \pi/2\), where one has a zero initial LST, another with non-zero initial LST, and third test with \(\mathrm{Dec}_{\mathrm{phase}}\) set to the latitude of the MWA and a non-zero initial LST. All tests have multiple time steps, and are tested against equivalent calculations made in C with 64 bit precision. The FLOAT code outputs are tested with an absolute tolerance of 1e-7 and the DOUBLE a tolerance of 1e-15.