mirror of
https://github.com/gnss-sdr/gnss-sdr
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96 lines
2.6 KiB
Markdown
96 lines
2.6 KiB
Markdown
# Galileo OSNMA Authentication Analyzer
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<!-- prettier-ignore-start -->
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[comment]: # (
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SPDX-License-Identifier: GPL-3.0-or-later
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)
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[comment]: # (
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SPDX-FileCopyrightText: 2025 Carles Fernandez-Prades <carles.fernandez@cttc.es>
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)
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<!-- prettier-ignore-end -->
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A Python script for analyzing and visualizing Galileo OSNMA (Open Service
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Navigation Message Authentication) authentication status from GNSS-SDR log
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files.
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## Features
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- **Log parsing**: Extracts OSNMA authentication data from GNSS-SDR log files.
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- **Visualization**: Creates timeline plots of OSNMA authentication status.
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- **Multiple output formats**: Supports PDF, PNG, SVG, EPS, and JPG formats.
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## Prerequisites
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- Python 3.6+
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- Required Python packages:
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- `pandas`
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- `matplotlib`
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## Usage
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```
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usage: osnma_log_viewer.py [-h] [--localtime] [--no-show] [-o OUTPUT] [--start START] [--end END] [-v] logfile
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Generate a Galileo navigation message authentication timeline plot from a GNSS-SDR log file.
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positional arguments:
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logfile GNSS-SDR log file path
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options:
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-h, --help show this help message and exit
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--localtime Display results in local time instead of UTC
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--no-show Run without displaying the plot window
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-o, --output OUTPUT Output file for plot (default: osnma_auth_timeline.pdf)
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--start START Initial datetime in "YYYY-MM-DD HH:MM:SS" format
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--end END Final datetime in "YYYY-MM-DD HH:MM:SS" format
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-v, --version Show program version and exit
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Example: osnma_log_viewer.py gnss-sdr.log --output auth_timeline.png --no-show --localtime
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```
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### Basic Usage
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```
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osnma_log_viewer.py gnss-sdr.log
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```
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This will create a plot named `osnma_auth_timeline.pdf` in the current
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directory.
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### Specify output file name
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```
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osnma_log_viewer.py gnss-sdr.log -o authentication_timeline.png
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```
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- Supported output formats
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- `.pdf` - Vector PDF (recommended for publications)
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- `.png` - Raster PNG image
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- `.svg` - Scalable Vector Graphics
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- `.eps` - Encapsulated PostScript
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- `.jpg` - JPEG image
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### Select the time range to plot
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Plot from a specific start time to the end of the log file:
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```
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osnma_log_viewer.py gnss-sdr.log --start "2025-08-26 10:35:00"
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```
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Plot from the beginning of the log file to a specific end time:
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```
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osnma_log_viewer.py gnss-sdr.log --end "2025-08-26 10:40:00"
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```
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Plot between a specific start and end time:
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```
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osnma_log_viewer.py gnss-sdr.log --start "2025-08-26 10:35:00" --end "2025-08-26 10:40:00"
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```
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If `--localtime` is passed, the `--start` and `--end` date-times are interpreted
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in the local time zone.
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