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Table of contents
I INTRODUCTION
I.1 Why studies of the water cycle are important?
I.1.1 Water cycle
I.1.2 Factors Affecting Water Cycle
I.2 Tools permitting the analysis of the water cycle
I.2.1 Ocean Water cycle
I.2.2 Continental Water Cycle
I.2.3 Existing tools for water cycle research
I.3 GNSS-R for water cycle studies
I.3.1 GNSS-R atmospheric studies
I.3.2 GNSS-R ocean studies
I.3.3 GNSS land/hydrology studies
I.4 Organization of the manuscript
II STATE OF THE ART OF GNSS-R
II.1 What is GNSS
II.1.1 Principle of GNSS
II.1.2 Description and structure of the GPS system
II.1.3 Description and structure of the GALILIO system
II.1.4 Description and structure of the GLONASS system
II.1.5 Other constellations
II.1.6 The Positioning measurement
II.1.7 Augmentation systems
II.1.8 Perspective
II.2 Reflection of GNSS signals
II.2.1 Multipath
II.2.2 Specular and diffuse reflection
II.3 GNSS Reflectometry (GNSS-R)
II.3.1 GNSS-R Measurement Techniques
II.3.2 Opportunity of the signal reflectometry
II.3.3 Observable obtained from airborne platforms
II.3.4 Interference Pattern Technical – Reflectometer with single antenna
II.3.5 Platforms and constraints
II.4 Efficiency of GNSS-R
II.5 Conclusions
III GNSS-R for soil moisture estimation using Unwrapping SNR phase for sandy soil
III.1 Introduction
III.2 Objective
III.3 GNSS R – SNR data for detecting soil moisture
III.3.1 Observation Sites
III.3.2 Soil moisture retrieval
III.3.3 Relation between soil moisture and vegetation height retrieval
III.4 Article – Monitoring of soil moisture dynamics in sandy areas using the nwrapping phase of GNSS-R
IV GNSS-R for detection of extreme hydrological events: Red River Delta and Mekong Delta (Vietnam)
IV.1 Introduction
IV.2 Methodology
IV.2.1 SNR-Least Square Method for the estimation of the continental water level
IV.3 Mekong Delta experiment (Vietnam)
IV.3.1 Presentation of the measurement site and experimental conditions
IV.3.2 Parameters for SNR data analysing
IV.3.3 Comparison between the height derived from GNSS-R and in-situ gauge records
IV.4 Red River Delta experiment (Vietnam)
IV.4.1 Presentation of the study area and datasets available
IV.4.2 Parameters for SNR data analysing
IV.4.3 Results
IV.5 Conclusion
V Conclusion and perspectives
V.1 Conclusion
V.2 Perspectives
