Global Navigation Satellite Systems for Earth Observing System

Dear Colleagues,

In the last few decades, we have seen the great progress of GNSS, which is originally not designed for earth observation, but now provides crucial opportunities in a broad scope of earth science processes. For one thing, the advancements in multi-GNSS, including GPS, GLONASS, BeiDou, Galileo, and QZSS continually improve the precision and accuracy of GNSS positioning; for another, high-quality positioning solutions makes GNSS ideal for studying geohazards and many types of geophysical phenomena, such as the movement of tectonic plates, volcano inflation and deflation, and smaller-scale phenomena such as landslides. Many countries and regions have funded a large number of projects to establish GNSS stations and networks, such as the American Plate Boundary Observatory, the Japanese GNSS Earth Observation Network System, and the Crustal Movement Observation Network of China. These projects have produced very abundant GNSS data for earth observation. As a result, new problems and challenges in GNSS algorithms, data processing, geophysical applications, and scientific interpretations will arise.

In this Special Issue, we invite original research and case studies focusing on recent developments in GNSS theories and algorithms and GNSS earth science applications. We encourage submissions that may include but are not limited to:

• High-precision GNSS and relevant algorithms
• New methods and relevant challenging issues for retrieving troposphere and ionosphere delays
• Co-/inter-/post-seismic crustal deformation, slow-deformation, and slip models of large earthquakes from GNSS or with other types of data (leveling data, InSAR, GRACE, etc.)
• Volcano, subsidence and landslide monitoring using GNSS
• GNSS meteorology and its implications for large-scale climate phenomena, such as ESNO and East Asian Monsoon
• Terrestrial-water-storage variation from GNSS and its effect on global sea-level change
• GNSS reflectometry for ocean and land applications
• Earthquake and tsunami early warning using real-time GNSS
• Challenging issues and future directions

Papers are welcomed on all of the above aspects, and more.

Dr. Jianghui Geng
Dr. Maorong Ge
Dr. Jennifer Haase
Dr. Weiping Jiang
Guest Editors

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