The revised edition reflects advancements in GPS technology and the development of the EU Galileo and Russian GLONASS systems. The author draws from practical experience in creating MFGsoft to enhance the book's content, ensuring theories and algorithms are relevant to the latest systems. Readers' interest prompted this update, allowing for a more thorough exploration of the subject matter. Notably, the author revisits previously rushed sections, adding depth and clarity to the discussions on numerical solutions and other key topics.
