mirror of
https://gitlab.science.ru.nl/mthesis-edeboone/m-thesis-introduction.git
synced 2024-11-13 10:03:32 +01:00
141 lines
4.7 KiB
Python
Executable file
141 lines
4.7 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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if __name__ == "__main__":
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from os import path
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import sys
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fname = "ZH_airshower/mysim.sry"
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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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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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if True and 'beacon_phase_true' in antennas[0].attrs:
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true_phases = np.array([a.attrs['beacon_phase_true'] for a in antennas])
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else:
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true_phases = np.empty( (len(antennas)) )
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for i, ant in enumerate(antennas):
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measured_phase = ant.attrs['beacon_phase_measured']
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geom_time = lib.geometry_time(tx, ant, c_light=3e8*1e-9)
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geom_phase = geom_time * 2*np.pi*f_beacon
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true_phases[i] = lib.phase_mod(measured_phase) - lib.phase_mod(geom_phase)
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ant.attrs['beacon_phase_true'] = true_phases[i]
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# Plot True Phases
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if True:
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fig, ax = plt.subplots()
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spatial_unit=None
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fig.suptitle('f= {: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'] = 'Spectral_r'
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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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# run over all baselines
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if True:
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baselines = list(combinations(antennas,2))
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# use ref_ant
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else:
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ref_ant = antennas[0]
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baselines = list(zip_longest([], antennas, fillvalue=ref_ant))
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integer_periods = None
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# read integer ks from file if possible
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# and save beacon_phase_true
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with h5py.File(antennas_fname, 'a') as fp:
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for i, ant in enumerate(antennas):
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name = ant.name
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# set true beacon_phase
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fp['antennas'][name].attrs['beacon_phase_true'] = true_phases[i]
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# read integer period from file
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if True and 'beacon_ks' in fp:
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integer_periods = np.array(fp['beacon_ks'])
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# Determine integer multiple of periods to shift
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if integer_periods is None:
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integer_periods = np.empty( (len(baselines), 3) )
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for i, base in enumerate(baselines):
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# Delta between first timestamp from both antennas
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delta_t_a = base[0].t[0] - base[1].t[0]
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# + phase difference
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delta_t_p = np.diff([ant.attrs['beacon_phase_true'] for ant in base])[0]/(2*np.pi*f_beacon)
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sampling_dt = (base[1].t[1] - base[1].t[0])
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print("DT(A,P)", delta_t_a, delta_t_p, 1/f_beacon)
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# which traces to keep track of
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traces = [ base[0].Ex, base[1].Ex ]
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# how many samples to shift
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ks, maxima = lib.coherence_sum_maxima(-1*traces[0], -1*traces[1])
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max_idx = np.argmax(maxima)
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delta_t_c = sampling_dt*ks[max_idx] # ns
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print("K", ks[max_idx], sampling_dt, '=', delta_t_c)
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k, rest = np.divmod(delta_t_c, f_beacon)
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integer_periods[i] = [int(base[0].name), int(base[1].name), k]
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print(k, rest*f_beacon, delta_t_p)
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# Only continue for two random combinations
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if i not in [ 50, 51 ]:
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continue
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fig, ax = plt.subplots()
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ax.set_xlabel("k")
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ax.set_ylabel("Maximum correlation")
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ax.plot(ks, maxima)
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ax.plot(ks[max_idx], maxima[max_idx], marker='X')
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fig, ax = plt.subplots()
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dt = base[1].t[1] - base[1].t[0]
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ax.set_xlabel('t')
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ax.plot(base[0].t, traces[0], label='Reference')
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ax.plot(base[1].t, traces[1], label='Original', alpha=0.4)
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ax.plot(base[1].t + delta_t_a + delta_t_c, traces[1], label='Coherence', alpha=0.6)
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ax.legend()
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# Save integer periods to antennas
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with h5py.File(antennas_fname, 'a') as fp:
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group_name = 'beacon_ks'
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if group_name in fp:
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del fp[group_name]
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fp.create_dataset(group_name, data=integer_periods)
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plt.show()
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# Report back to CLI
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print("Period Multiples resolved in", antennas_fname)
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