Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.11765/12697
Analysis of the snow water equivalent at the AEMet-Formigal field laboratory (Spanish Pyrenees) during the 2019/2020 winter season using a stepped-frequency continuous wave radar (SFCW)
Title: Analysis of the snow water equivalent at the AEMet-Formigal field laboratory (Spanish Pyrenees) during the 2019/2020 winter season using a stepped-frequency continuous wave radar (SFCW)
Authors: Alonso, RafaelGarcía del Pozo, José MaríaBuisán, Samuel ORCID RESEARCHERID SCOPUSID Autor AEMETÁlvarez, José Adolfo
Keywords: Snow; Snow water equivalent; SWE; Stepped-frequency continuous wave radar; SFCW; Software defined radio; SDR; Snowpack multilayer reflectance
Issue Date: 2021
Publisher: Multidisciplinary Digital Publishing Institute
Citation: Remote Sensing. 2021, 13(4), 616
Publisher version: https://dx.doi.org/10.3390/rs13040616
Abstract: Snow makes a great contribution to the hydrological cycle in cold regions. The parameter to characterize available the water from the snow cover is the well-known snow water equivalent (SWE). This paper presents a near-surface-based radar for determining the SWE from the measured complex spectral reflectance of the snowpack. The method is based in a stepped-frequency continuous wave radar (SFCW), implemented in a coherent software defined radio (SDR), in the range from 150 MHz to 6 GHz. An electromagnetic model to solve the electromagnetic reflectance of a snowpack, including the frequency and wetness dependence of the complex relative dielectric permittivity of snow layers, is shown. Using the previous model, an approximated method to calculate the SWE is proposed. The results are presented and compared with those provided by a cosmic-ray neutron SWE gauge over the 2019–2020 winter in the experimental AEMet Formigal-Sarrios test site. This experimental field is located in the Spanish Pyrenees at an elevation of 1800 m a.s.l. The results suggest the viability of the approximate method. Finally, the feasibility of an auxiliary snow height measurement sensor based on a 120 GHz frequency modulated continuous wave (FMCW) radar sensor, is shown.
Sponsorship : This work was supported by DGA-FSE under grant T20_17R to the Photonics Technologies Group of University of Zaragoza.
URI: http://hdl.handle.net/20.500.11765/12697
ISSN: 2072-4292
Appears in Collections:Artículos científicos 2019-2021


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