Journal article

Improving the Accuracy of Soil Moisture Retrievals Using the Phase Difference of the Dual-Polarization GNSS-R Interference Patterns

A Alonso-Arroyo, A Camps, A Aguasca, G Forte, A Monerris, C Ruediger, JP Walker, H Park, D Pascual, R Onrubia

IEEE Geoscience and Remote Sensing Letters | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2014

Abstract

Soil moisture (SM) is a key parameter in the climate studies at a global scale and a very important parameter in applications such as precision agriculture at a local scale. The Global Navigation Satellite Systems Interference Pattern Technique (IPT) has proven to be a useful technique for the determination of SM, based on observations at vertical polarization (V-Pol) due to the Brewster angle. The IPT can be applied at both V-Pol and horizontal polarization (H-Pol) at the same time, observing the Brewster angle only at V-Pol. This letter presents a measurement technique based on tracking the phase difference between V-Pol and H-Pol interference patterns to improve the accuracy of the Brewst..

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Grants

Awarded by Spanish Ministry of Science and Innovation


Funding Acknowledgements

This work was supported in part by the Spanish Ministry of Science and Innovation project, "AROSA-Advanced Radio Ocultations and Scatterometry Applications using GNSS and other opportunity signals" code AYA2011-29183-C02-01/ESP, in part by a Monash University Faculty of Engineering Seed Grant 2013, in part by ACROSS (Advanced Remote Sensing Ground-Truth Demo and Test Facilities), and in part by TERENO (Terrestrial Environmental Observatories) funded by the German Helmholtz-Association.