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https://github.com/gnss-sdr/gnss-sdr
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110 lines
3.5 KiB
Markdown
110 lines
3.5 KiB
Markdown
## Rinex2assist
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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: 2019-2020 Carles Fernandez-Prades <carles.fernandez@cttc.es>
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)
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<!-- prettier-ignore-end -->
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This program reads data from RINEX navigation files and generates XML files that
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can be read by GNSS-SDR as Assisted GNSS data.
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### Building
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This program is built along with GNSS-SDR if the options
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`ENABLE_UNIT_TESTING_EXTRA` or `ENABLE_SYSTEM_TESTING_EXTRA` are set to `ON`
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when calling CMake:
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```
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$ cmake -DENABLE_SYSTEM_TESTING_EXTRA=ON ..
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$ make
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$ sudo make install
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```
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The last step is optional. Without it, you will get the executable at
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`../install/rinex2assist`.
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The building requires two extra dependencies: the Boost Iostreams library and
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the program `uncompress`:
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- The Boost Iostreams library can be installed through a package:
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- In Debian / Ubuntu: `sudo apt-get install libboost-iostreams-dev`
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- In Fedora / CentOS: `sudo yum install boost-iostreams`
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- In OpenSUSE: `sudo zypper install libboost_iostreams-devel`
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- In Arch Linux: included in `boost-libs` package.
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- In macOS: included in Macports / Homebrew `boost` package.
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- The program `uncompress` is available by default in most UNIX and GNU/Linux
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systems.
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- In Fedora / CentOS: `sudo yum install ncompress`
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- In OpenSUSE: `sudo zypper install ncompress`
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### Usage
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The usage is as follows:
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```
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$ rinex2assist /path/to/RINEX_nav_file
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```
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The argument is mandatory (the name of the RINEX navigation file). The name
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`gps_ephemeris.xml` is given to the output if GPS NAV data is fould. If the
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RINEX file contains Galileo data, the corresponding `gal_ephemeris.xml` file
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will be generated. The program is also able to extract parameters of the UTC and
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the Ionospheric models from the RINEX header, if available. They will be called
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`gps_utc_model.xml`, `gps_iono.xml`, `gal_utc_model.xml` and `gal_iono.xml`.
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There are some servers available for downloading recent RINEX navigation files.
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For instance:
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- NASA:
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[ftp://cddis.gsfc.nasa.gov/pub/gnss/data/hourly/](ftp://gssc.esa.int/gnss/data/hourly/)
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- ESA:
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[ftp://gssc.esa.int/gnss/data/hourly/](ftp://gssc.esa.int/gnss/data/hourly/)
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- UNAVCO:
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[ftp://data-out.unavco.org/pub/hourly/rinex/](ftp://data-out.unavco.org/pub/hourly/rinex/)
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Just make sure to pick up a recent file from a
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[station near you](http://www.igs.org/network).
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The program accepts either versions 2.xx or 3.xx for the RINEX navigation data
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file, as well as compressed files (ending in `.gz` or `.Z`).
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Examples:
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```
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$ rinex2assist EBRE00ESP_R_20183290400_01H_GN.rnx.gz
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Generated file: gps_ephemeris.xml
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Generated file: gps_utc_model.xml
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Generated file: gps_iono.xml
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```
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and
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```
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$ rinex2assist EBRE00ESP_R_20183290000_01H_EN.rnx.gz
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Generated file: gal_ephemeris.xml
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Generated file: gal_utc_model.xml
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Generated file: gal_iono.xml
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```
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An example of GNSS-SDR configuration using ephemeris, UTC and ionospheric model
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parameters for GPS L1 and Galileo signals is shown below:
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```
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GNSS-SDR.AGNSS_XML_enabled=true
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GNSS-SDR.AGNSS_ref_location=41.39,2.31
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GNSS-SDR.AGNSS_gps_ephemeris_xml=gps_ephemeris.xml
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GNSS-SDR.AGNSS_gps_iono_xml=gps_iono.xml
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GNSS-SDR.AGNSS_gps_utc_model_xml=gps_utc_model.xml
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GNSS-SDR.AGNSS_gal_ephemeris_xml=gal_ephemeris.xml
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GNSS-SDR.AGNSS_gal_iono_xml=gal_iono.xml
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GNSS-SDR.AGNSS_gal_utc_model_xml=gal_utc_model.xml
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```
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More info about the usage of AGNSS data
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[here](https://gnss-sdr.org/docs/sp-blocks/global-parameters/#assisted-gnss-with-xml-files).
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