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
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..View full abstract
Awarded by Spanish Ministry of Science and Innovation
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.