gpssnrpy
Table of Contents
The gpssnr python library (gpssnrpy) will allow python users easy access to RINEX translators currently only provided in Fortran - gpsSNR and gnssSNR. This first version is a port of gpsSNR. I have also included some utilities that I originally packaged with gnssrefl.
Installation
-
cd into gpssnrpy, set up a virtual environment and activate it.
-
pip install .
Usage of gpssnr
Inputs:
- RINEX v2.11 observation filename
- output filename
- RINEX v2.11 navigation filename
- SNR choice (99, 66, 88, 50) as defined at the gnssrefl website
Optional
- -dec decimation (seconds)
Sample usage:
- gpssnr rinexname outputname navname 99
I have provided a small obs file (and nav file) you can use to test the code:
- gpssnr p1011500.20o p1011500.snr auto1500.20n 99
Download RINEX files
-
download_rinex station year month day
-
download_rinex station year doy 0
The station name, station, must be four character and lower case. The default is RINEX version 2.11 and low-rate files. Please use -h to find out how to download high rate data or version 3.
Optional:
- archive
These are the currently supported archives: sopac, unavco, sonel, cddis, nz, ga, bkg, ngs, nrcan
You need to install CRX2RNX for true access to these RINEX files. It should be stored in a folder with the environment variable EXE
Download orbit files
- download_orbits src year month day
Sample usage:
-
download_orbits nav 2020 150 0 (for doy 150)
-
download_orbits nav 2020 12 31 (for December 31)
orbit sources (src) currently allowed (lowercase):
- nav : GPS broadcast, perfectly adequate for reflectometry.
- igs : IGS precise, GPS only
- igr : IGS rapid, GPS only
- jax : JAXA, GPS + Glonass, within a few days, very reliable
- gbm : GFZ Potsdam, multi-GNSS, not rapid
- grg: French group, GPS, Galileo and Glonass, not rapid
- wum : Wuhan, multi-GNSS, not rapid
Future work and acknowledgements
I am still working on this documentation. I will be adding instructions on how to use these as libraries.
Multi-GNSS capabilities, a la gnssSNR, will be added.
This capability will be added to gnssrefl.
Kristine M. Larson https://kristinelarson.net
Thank you to the developers of numpy for providing excellent documentation for f2py and raxod502 for his package management help!
1 maintainer
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