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https://gitlab.science.ru.nl/mthesis-edeboone/m-thesis-introduction.git
synced 2024-11-13 10:03:32 +01:00
120 lines
4 KiB
Python
Executable file
120 lines
4 KiB
Python
Executable file
#!/usr/bin/env python3
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# vim: fdm=indent ts=4
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import h5py
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from itertools import combinations, zip_longest
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import matplotlib.pyplot as plt
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import numpy as np
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import aa_generate_beacon as beacon
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import lib
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def antenna_true_phases(tx, antennas, freq_name, c_light=3e8):
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"""
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Determine true phases from the antenna phases.
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This removes the geometrical phase from the antenna phase.
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"""
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if not hasattr(antennas, '__len__'):
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single_ant = True
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antennas = [antennas]
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true_phases = np.empty( (len(antennas)) )
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for i, ant in enumerate(antennas):
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beacon_info = ant.beacon_info[freq_name]
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measured_phase = ant.beacon_info[freq_name]['phase']
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f_beacon = ant.beacon_info[freq_name]['freq']
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geom_time = lib.geometry_time(tx, ant, c_light=c_light)
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geom_phase = geom_time * 2*np.pi*f_beacon
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true_phases[i] = lib.phase_mod(lib.phase_mod(measured_phase) - lib.phase_mod(geom_phase) )
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return true_phases
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if __name__ == "__main__":
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from os import path
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import sys
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import matplotlib
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matplotlib.use('Agg')
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fname = "ZH_airshower/mysim.sry"
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c_light = 3e8*1e-9 # m/ns
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show_plots = True
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remove_absolute_phase_offset_first_antenna = True # takes precedence
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remove_absolute_phase_offset_minimum = True
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####
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fname_dir = path.dirname(fname)
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antennas_fname = path.join(fname_dir, beacon.antennas_fname)
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fig_dir = "./figures" # set None to disable saving
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if not path.isfile(antennas_fname):
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print("Antenna file cannot be found, did you try generating a beacon?")
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sys.exit(1)
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# Read in antennas from file
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f_beacon, tx, antennas = beacon.read_beacon_hdf5(antennas_fname)
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# Make sure at least one beacon has been identified
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if not hasattr(antennas[0], 'beacon_info') or len(antennas[0].beacon_info) == 0:
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print(f"No analysed beacon found for {antennas[0].name}, try running the phase analysis script first.")
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sys.exit(1)
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#
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N_beacon_freqs = len(antennas[0].beacon_info)
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for freq_name in antennas[0].beacon_info.keys():
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true_phases = antenna_true_phases(tx, antennas, freq_name, c_light=c_light)
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# Remove the phase from one antenna
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# this is a free parameter
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# (only required for absolute timing)
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if remove_absolute_phase_offset_first_antenna or remove_absolute_phase_offset_minimum:
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if remove_absolute_phase_offset_first_antenna: # just take the first phase
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minimum_phase = -1*true_phases[0]
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else: # take the minimum
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minimum_phase = -1*np.min(true_phases, axis=-1)
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true_phases += minimum_phase
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true_phases = lib.phase_mod(true_phases)
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# Save to antennas in file
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with h5py.File(antennas_fname, 'a') as fp:
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h5group = fp['antennas']
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for i, ant in enumerate(antennas):
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h5ant = fp['antennas'][ant.name]
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h5beacon_freq = h5ant['beacon_info'][freq_name]
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h5beacon_freq.attrs['true_phase'] = true_phases[i]
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# Plot True Phases at their locations
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if show_plots or fig_dir:
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fig, ax = plt.subplots()
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spatial_unit=None
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fig.suptitle('True phases\nf_beacon= {:2.0f}MHz'.format(f_beacon*1e3))
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antenna_locs = list(zip(*[(ant.x, ant.y) for ant in antennas]))
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ax.set_xlabel('x' if spatial_unit is None else 'x [{}]'.format(spatial_unit))
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ax.set_ylabel('y' if spatial_unit is None else 'y [{}]'.format(spatial_unit))
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scatter_kwargs = {}
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scatter_kwargs['cmap'] = 'inferno'
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scatter_kwargs['vmin'] = -np.pi
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scatter_kwargs['vmax'] = +np.pi
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color_label='$\\varphi$'
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sc = ax.scatter(*antenna_locs, c=true_phases, **scatter_kwargs)
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fig.colorbar(sc, ax=ax, label=color_label)
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if fig_dir:
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fig.savefig(path.join(fig_dir, __file__ + f".F{freq_name}.pdf"))
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print(f"True phases written to", antennas_fname)
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if show_plots:
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plt.show()
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