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feat: improve readability of PVT-TRK time offset plots

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pedromiguelcp
2025-08-13 19:54:47 +01:00
committed by Carles Fernandez
parent 00b9632873
commit 0ce37a4cb9
1 changed files with 29 additions and 1 deletions
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30
utils/python/dll_pll_veml_plot_sample.py
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@@ -54,6 +54,12 @@ for N in range(1, channels+1):
f'trk_dump_ch{N-1+first_channel}.dat')
GNSS_tracking.append(dll_pll_veml_read_tracking_dump(tracking_log_path))
# Store all PVT_TRK_diff plots in one figure
if PVT_TRK_diff == 1:
all_times = []
all_offsets = []
all_prns = []
# GNSS-SDR format conversion to Python GPS receiver
for N in range (1, channels+1):
if 0 < plot_last_outputs < len(GNSS_tracking[N - 1].get("code_freq_hz")):
@@ -123,5 +129,27 @@ for N in range (1, channels+1):
plt.ylabel('Offset(ms)')
plt.title('PVT Tracking Time Offset ' + str(N))
plt.savefig(os.path.join(fig_path, f'PVT_TRK_diff_{N}.png'))
# Set y-axis limits
plt.ylim(200, 500)
plt.savefig(os.path.join(fig_path, f'PVT_TRK_diff_ch_{N}.png'))
plt.show()
# Save data for the combined plot
all_times.append(trackResults[N - 1]['prn_start_time_s'])
all_offsets.append([x / (sampling_freq / 1000) for x in GNSS_tracking[N - 1]['PVT_TRK_diff'][start_sample:]])
all_prns.append(int(trackResults[N - 1]['PRN'][0]))
# ---- Combined plot for all satellites ----
if PVT_TRK_diff == 1 and all_times:
plt.figure()
for t, y, prn in zip(all_times, all_offsets, all_prns):
plt.plot(t, y, label=f"PRN {prn}")
plt.xlabel("Time(s)")
plt.ylabel("Offset(ms)")
plt.title("PVT Tracking Time Offset - All Satellites")
plt.ylim(200, 500)
plt.legend()
plt.grid(True)
plt.savefig(os.path.join(fig_path, "PVT_TRK_diff_all_ch.png"))
plt.show()