goGPS project

goGPS MATLAB version 0.3.0 beta is available for download.

A summary of the main changes since v0.2.0beta:

Core:
Re-structured the core functions for:

• improving the satellite orbits computation by iterative least squares adjustment together with receiver position and clock
• optimizing the code by removing duplicate function calls and unnecessary ‘for’ cycles (computation speed improved by ~15%)
• making the code more easily understandable and modifiable

Introduced a check on the condition number on the eigenvalues of the normal matrix in the stand-alone least squares positioning algorithm, for detecting ill-conditioned problems and excluding their results from the final solution

Added SP3 (precise ephemeris) positioning

Input:
Improved the RINEX parser
Added a SP3 parser

Output:
Modified the structure of *_position.txt and *_cov.txt output files: fixed-width instead of tab-delimited fields
Added “Date” and “GPS time [hh:mm:ss]” fields to *_position.txt files

Miscellanea:
Added ETRF2000 – ITRF2008 transformation functions
Modified the algorithm for Julian date <-> GPS week/TOW conversion
Speed optimizations
Bug-fixing

Note 1: goGPS binary observation data (*_obs_* and *_eph_*) format was not modified, thus old datasets can be used with the new version without any modification.

Note 2: GUI settings files are also unchanged.

Please report any bug you find or any problem you may have.
If you find goGPS to be useful feel free to post a quick comment in the mailing list!