mirror of https://github.com/gnss-sdr/gnss-sdr
100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
"""
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gps_l1_ca_telemetry_plot_sample.py
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Reads GNSS-SDR Tracking dump binary file using the provided function and
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plots some internal variables
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Irene Pérez Riega, 2023. iperrie@inta.es
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Modifiable in the file:
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sampling_freq - Sampling frequency [Hz]
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channels - Number of channels to check if they exist
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doppler_opt - = 1 -> Plot // = 0 -> No plot
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path - Path to folder which contains raw file
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fig_path - Path where plots will be save
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chn_num_a / b - Channel which will be plotted
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-----------------------------------------------------------------------------
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GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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This file is part of GNSS-SDR.
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Copyright (C) 2022 (see AUTHORS file for a list of contributors)
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SPDX-License-Identifier: GPL-3.0-or-later
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-----------------------------------------------------------------------------
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"""
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import os
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import matplotlib.pyplot as plt
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from lib.gps_l1_ca_read_telemetry_dump import gps_l1_ca_read_telemetry_dump
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GNSS_telemetry = []
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# ---------- CHANGE HERE:
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sampling_freq = 2000000
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channels = list(range(18))
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path = '/home/labnav/Desktop/TEST_IRENE/'
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fig_path = '/home/labnav/Desktop/TEST_IRENE/PLOTS/Telemetry'
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if not os.path.exists(fig_path):
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os.makedirs(fig_path)
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i = 0
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for N in channels:
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try:
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telemetry_log_path = os.path.join(path, f'telemetry{N}.dat')
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telemetry_data = gps_l1_ca_read_telemetry_dump(telemetry_log_path)
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GNSS_telemetry.append(telemetry_data)
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i += 1
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except:
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pass
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# ---------- CHANGE HERE:
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chn_num_a = 0
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chn_num_b = 5
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# Plotting values
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if chn_num_a in range(i) and chn_num_b in range(i):
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# First Plot:
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plt.figure()
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plt.gcf().canvas.manager.set_window_title(f'Telem_Current_Simbol_TOW_'
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f'{chn_num_a}_{chn_num_b}.png')
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plt.plot(GNSS_telemetry[chn_num_a]['tracking_sample_counter'],
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[x / 1000 for x in GNSS_telemetry[chn_num_a]
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['tow_current_symbol_ms']], 'b')
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plt.plot(GNSS_telemetry[chn_num_b]['tracking_sample_counter'],
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GNSS_telemetry[chn_num_b]['tow_current_symbol_ms'], 'r')
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plt.grid(True)
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plt.xlabel('TRK Sampling Counter')
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plt.ylabel('Current Symbol TOW')
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plt.legend([f'CHN-{chn_num_a-1}', f'CHN-{chn_num_b-1}'])
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plt.tight_layout()
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plt.savefig(os.path.join(fig_path, f'Telem_Current_Simbol_TOW_{chn_num_a}'
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f'_{chn_num_b}.png'))
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plt.show()
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# Second Plot:
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plt.figure()
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plt.gcf().canvas.manager.set_window_title(f'Telem_TRK_Sampling_Counter_'
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f'{chn_num_a}_{chn_num_b}.png')
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plt.plot(GNSS_telemetry[chn_num_a]['tracking_sample_counter'],
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GNSS_telemetry[chn_num_a]['tow'], 'b')
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plt.plot(GNSS_telemetry[chn_num_b]['tracking_sample_counter'],
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GNSS_telemetry[chn_num_b]['tow'], 'r')
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plt.grid(True)
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plt.xlabel('TRK Sampling Counter')
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plt.ylabel('Decoded Nav TOW')
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plt.legend([f'CHN-{chn_num_a-1}', f'CHN-{chn_num_b-1}'])
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plt.tight_layout()
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plt.savefig(os.path.join(fig_path, f'Telem_TRK_Sampling_Counter_'
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f'{chn_num_a}_{chn_num_b}.png'))
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plt.show()
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