The goal of the GPSTk project is to provide a world class, open source computing suite to the satellite navigation community.

GPSTk Library

The GPSTk library provides a number of models and algorithms found in GPS textbooks and classic papers, such as solving for the user position, or estimating atmospheric refraction. Common formats are supported as well, such as RINEX or SP-3. There are several categories of functions in the GPSTk library:

http://gpstk.sourceforge.net/

See also: ?[OpenGIS]