Software Tools
The pages in this section contain software and related tools used in GPS Lab research.
MatLab Algorithm Availability Simulation Tool (MAAST)
MAAST is a publicly available, customizable MATLAB toolset for simulating WAAS confidence estimation algorithms and evaluating their effects on service availability.
Stanford University GPS Laboratory Ephemeris Files (SUGL)
These files are in RINEX format and contain GPS navigation data that have been processed as described in Dr. Liang Heng's thesis. They are derived from the IGS navigation data files which are then cross-compared to eliminate erroneous data. These files have not all been manually validated and may still contain some incorrect information.
Two-Step Gaussian Overbounding Algorithm
These MATLAB scripts implement the two-step Gaussian overbounding algorithm described in our 2017 ION GNSS+ paper . The scripts determine Gaussian overbounding distributions by combining CDF bounding and paired overbounding. This combination removes important limitations in the two main results used in overbounding. It is based on the determination of an intermediate overbounding distribution that is symmetric and unimodal, but not Gaussian.
Stanford GPS/GNSS MatLab Platform
This platform is an integrated research environment for utilizing numerous positioning databases. It provides a unified interface to multiple GPS/GNSS data formats, including NSTB, NMEA, and RINEX. Example databases include NSTB stations that continuously collect GPS information at numerous publicly accessible sites.