Dual-polarization GNSS-R interference pattern technique for soil moisture mapping
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| Název: | Dual-polarization GNSS-R interference pattern technique for soil moisture mapping |
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| Autoři: | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció, Alonso Arroyo, Alberto, Camps Carmona, Adriano José, Aguasca Solé, Alberto, Forte Veliz, Giuseppe Francesco, Monerris Belda, Alessandra, Rudiger, Christoph, Walker, Jeffrey, Hyuk, Park, Pascual Biosca, Daniel, Onrubia Ibáñez, Raúl |
| Informace o vydavateli: | 2014-05-01 |
| Druh dokumentu: | Electronic Resource |
| Abstrakt: | The interference pattern technique (IPT) consists of the coherent addition of the direct and reflected global navigation satellite systems (GNSS) signals in the receiving antenna. The detected power oscillates (fading), and the amplitude of these oscillations is very sensitive to the soil reflection coefficient at the specular reflection point. Therefore, variations of the reflection coefficient can be mapped, and thus dielectric constant variations, from which soil moisture can be retrieved. This work extends the use of the IPT technique from vertical polarization (V-Pol) to horizontal polarization (H-Pol). Moreover, the IPT equations are reformulated to facilitate the combination of dual-polarization retrievals. Simulations of the interference patterns at V-and H-Pol are presented for different soil moisture conditions. An upgrade of the SMIGOL GNSS-R instrument for dual-polarization observations is presented. This instrument was deployed in a flat, dry grassland in Yanco, Australia, in order to validate the proposed concepts. Finally, a comparison between the data retrieved from the SMIGOL instrument and the ground-truth soil moisture data is presented showing a good agreement between them and rainfall information. Peer Reviewed Postprint (published version) |
| Témata: | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar, Àrees temàtiques de la UPC::Desenvolupament humà i sostenible, Global Positioning System, Soil moisture--Measurement, Brewster angle, global navigation satellite systems (GNSS), GNSS reflectometry (GNSS-R), interference pattern technique (IPT), soil moisture (SM), GPS bistatis radar, Reflectometry, Ocean, Permittivity, Surface, Signals, SMEX02, GNSS (Sistema de navegació), Sòls -- Humitat -- Mesurament, Article |
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| Dostupnost: | Open access content. Open access content Restricted access - publisher's policy |
| Poznámka: | 12 p. application/pdf English |
| Other Numbers: | HGF oai:upcommons.upc.edu:2117/26527 Alonso-Arroyo, A. [et al.]. Dual-polarization GNSS-R interference pattern technique for soil moisture mapping. "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing", 01 Maig 2014, vol. 7, núm. 5, p. 1533-1544. 1939-1404 10.1109/JSTARS.2014.2320792 1132974081 |
| Přispívající zdroj: | UNIV POLITECNICA DE CATALUNYA From OAIster®, provided by the OCLC Cooperative. |
| Přístupové číslo: | edsoai.on1132974081 |
| Databáze: | OAIster |
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