Open Source GPS Software

The EPC software calculates velocities for any points located on the earth’s surface given the Euler pole parameters and estimates the Euler pole parameters given the observed velocities of a set of sites located on a tectonic plate. Since version 2, the software is able to estimate or apply the Plate Translation Rates, as well. Please cite one of the following papers when you use the software: - Goudarzi, M A, Cocard, M, and Santerre, R. 2014."EPC: Matlab Software to Estimate Euler Pole Parameters". GPS Solutions 18 (1): 153–62. DOI: 10.1007/s10291-013-0354-4*. - Goudarzi, M A. 2025."Evaluating Euler Pole Parameters for the North American Terrestrial Reference Frame of 2022". Geodesy and Geodynamics. DOI: 10.1016/j.geog.2025.03.004. * The element G_23 of the Jacobian matrix of linearized observations in formula 18 (page 4) in this paper has an incorrect sign (minus sign should be removed). This is discussed in: https://doi.org/10.1007/s10291-025-01932-7.

Along with calculating basic statistics and quality parameters such as mean and variance, the soft-ware is capable of importing and visualizing different standard time series formats, determining and removing jumps and outliers, and makes numerical and publication quality graphical outputs. Bivariate statistical analysis (including correlation coefficient and linear regression) and time series analysis (including auto and cross-spectral analysis, wavelet power spectrum, spectrogram and periodicities) form the main analysis features of the software.

GPS Date Converter (GDC) is a program to convert six different date formats, including: (1) Decimal year, (2) Year, Month, Day, (3) Year, Day of year, (4) GPS Week, Day of week, (5) Julian date, and (6) Modified Julian date. These formats are quiet common in Earth Sciences, specially GPS applications. More information can be found in the GDC website.

A software directed towards the geomatics engineering community. OpenSSG efficiently implements a collection of components vital to geomatics industry using smooth and flexible interface.

QMapExplorer is an application to access, view and explore tile based online maps like OpenStreetMap or GoogleMaps. This is the first beta release with serious functionality. Enjoy!

rinex3manipulator is a software to manipulate RINEX 3 files, available functions are: - cut - under sample - filter constellation observations This small program is born to handle in a fast way RINEX 3 files to be used subsequently by the goGPS software: https://sourceforge.net/projects/gogps/

GPSBook is a software dedicated to manage display and manipulate GPS traces.

* Please check latest update on https://github.com/igps-ftk/iGPS A tool written in Interactive Data Language (IDL), for processing and analyzing daily continuous GPS position time series. It can read time series in various formats, detect outliers, remove abnormal observation spans, find jumps, extract common-mode components(CMC), etc.

Using PHP-CLI to parse NMEA data to generate depth maps with GD. As fishing is a passion of mine,and it got me to consider using the NMEA formatted data output from my Lowrance 5-DSI Elite to generate a bathymetric map of the lake at my cottage. It is currently very crude, just a bunch of CLI scripts that record NMEA data, and the other parses the stored data and builds a depth, water temperature and sample frequency map.