Guochang Xu Livres

This reference and handbook describes static, kinematic and dynamic Global Positioning System (GPS) theory, algorithms and applications. It is primarily based on source-code descriptions of the KSGSoft program developed by the author at the GFZ in Potsdam. The theory and algorithms are revised and extended for a new development of a multiple functional GPS software. New concepts such as the unified GPS data processing method and ambiguity-ionospheric algorithm, as well as general ambiguity search criteria, are reported for the first time. Mathematically rigorous, the book begins with the basics of coordinate and time systems and satellite orbits, as well as GPS observables, and deals with topics such as physical influences, observation equations, adjustment and filtering, ambiguity resolution, data processing, kinematic positioning, and the determination of perturbed orbits.

The development of the orbits theory lags behind the development of satellite technology. This book provides, for the first time in the history of human satellite development, the complete third order solution of the orbits under all possible disturbances. It describes the theory of satellite orbits, derives the complete solutions of the orbital disturbances, describes the algorithms of orbits determination based on the theory, describes the applications of the theory to the phenomenon of the satellite formation physically. The subjects include: Orbits Motion Equations, Disturbance theory, Solutions of the differential Equations, Algorithms of Orbits determinations, Applications of the theory to the satellite formation.

This series of reference books presents various sciences related to geodesy through independent chapters, each focusing on a specific field. Each chapter delves into the history, theory, objectives, technology, development, research highlights, and applications of its subject, while also addressing challenges and future directions. Topics covered include Absolute and Relative Gravimetry, Adaptively Robust Kalman Filters in Navigation, Airborne Gravity Field Determination, Analytic Orbit Theory, Deformation and Tectonics, Earth Rotation, GPS Algorithm Equivalence, Marine Geodesy, Satellite Laser Ranging, Superconducting Gravimetry, and Synthetic Aperture Radar Interferometry. This compilation uniquely combines these subjects, making it a valuable resource for teaching and understanding the foundational principles of geodesy. The content is designed to provide a general overview for high-level researchers, educators, engineers, and students, with some chapters filling gaps in the existing literature. Most contributions are authored by renowned scientists in their respective fields. The chapters are organized by title, and each includes summaries and introductions to the authors and co-authors. For instance, the first chapter on “Absolute and Relative Gravimetry” offers insights into the gravimetric methods used to accurately measure gravity acceleration at specific locations.