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On the correlation between GNSS-R reflectivity and L-band microwave radiometry
dc.contributor.author | Alonso Arroyo, Alberto |
dc.contributor.author | Camps Carmona, Adriano José |
dc.contributor.author | Monerris Belda, Sandra |
dc.contributor.author | Rudiger, Christoph |
dc.contributor.author | Walker, Jeffrey |
dc.contributor.author | Onrubia Ibáñez, Raúl |
dc.contributor.author | Querol Borràs, Jorge |
dc.contributor.author | Hyuk, Park |
dc.contributor.author | Pascual Biosca, Daniel |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.contributor.other | Universitat Politècnica de Catalunya. Doctorat en Teoria del Senyal i Comunicacions |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física |
dc.date.accessioned | 2020-11-18T10:36:02Z |
dc.date.available | 2020-11-18T10:36:02Z |
dc.date.issued | 2016-12 |
dc.identifier.citation | Alonso-Arroyo, A. [et al.]. On the correlation between GNSS-R reflectivity and L-band microwave radiometry. "IEEE journal of selected topics in applied earth observations and remote sensing", Desembre 2016, vol. 9, núm. 12, p. 5862-5879. |
dc.identifier.issn | 1939-1404 |
dc.identifier.uri | http://hdl.handle.net/2117/332399 |
dc.description.abstract | This work compares microwave radiometry and global navigation satellite systems-reflectometry (GNSS-R) observations using data gathered from airborne flights conducted for three different soil moisture conditions. Two different regions are analyzed, a crops region and a grassland region. For the crops region, the correlation with the I/2 (first Stokes parameter divided by two) was between 0.74 and 0.8 for large incidence angle reflectivity data (30°-50°), while it was between 0.51 and 0.61 for the grassland region and the same incidence angle conditions. For the crops region, the correlation with the I/2 was between 0.64 and 0.69 for lower incidence angle reflectivity data (<;30°), while it was between 0.41 and 0.6 for the grassland region. This indicates that for large incidence angles the coherent scattering mechanism is dominant, while the lower incidence angles are more affected by incoherent scattering. Also a relationship between the reflectivity and the polarization index (PI) is observed. The PI has been used to remove surface roughness effects, but due to its dependence on the incidence angle only the large incidence angle observations were useful. The difference in ground resolution between microwave radiometry and GNSS-R and their strong correlation suggests that they might be combined to improve the spatial resolution of microwave radiometry measurements in terms of brightness temperature and consequently soil moisture retrievals. |
dc.description.sponsorship | This work was supported in part by the Spanish Ministry of Science and Innovation, “AROSA-Advanced Radio Ocultations and Scatterometry Applications using GNSS and other opportunity signals,” under Grant AYA2011-29183-C02-01/ESP and “AGORA: Tecnicas Avanzadas en Teledetección Aplicada Usando Señales GNSS y Otras Señales de Oportunidad,” under Grant ESP2015-70014-C2-1-R (MINECO/FEDER), in part by the Monash University Faculty of Engineering 2013 Seed Grant, and in part by the Advanced Remote Sensing Ground-Truth Demo and Test Facilities and Terrestrial Environmental Observatories funded by the German Helmholtz-Association. The work of A. A.-Arroyo was supported by the Fulbright Commission in Spain through a Fulbright grant. |
dc.format.extent | 18 p. |
dc.language.iso | eng |
dc.publisher | Institute of Electrical and Electronics Engineers (IEEE) |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços |
dc.subject.lcsh | Artificial satellites in earth sciences |
dc.subject.lcsh | Microwave remote sensing |
dc.subject.other | Brightness temperature |
dc.subject.other | Coherent reflectivity |
dc.subject.other | GNSS-R |
dc.subject.other | Microwave radiometry |
dc.subject.other | Soil moisture (SM) |
dc.title | On the correlation between GNSS-R reflectivity and L-band microwave radiometry |
dc.type | Article |
dc.subject.lemac | Satèl·lits artificials en ciències de la terra |
dc.subject.lemac | Teledetecció per microones |
dc.contributor.group | Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai |
dc.contributor.group | Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció |
dc.identifier.doi | 10.1109/JSTARS.2016.2588281 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://ieeexplore.ieee.org/document/7542511/ |
dc.rights.access | Open Access |
local.identifier.drac | 19697191 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/MICINN//AYA2011-29183-C02-01/ES/APLICACIONES AVANZADAS EN RADIO OCULTACIONES Y DISPERSOMETRIA UTILIZANDO SEÑALES GNSS Y OTRAS SEÑALES DE OPORTUNIDAD/ |
dc.relation.projectid | info:eu-repo/grantAgreement/MINECO//ESP2015-70014-C2-1-R/ES/TECNICAS AVANZADAS EN TELEDETECCION APLICADA USANDO SEÑALES GNSS Y OTRAS SEÑALES DE OPORTUNIDAD/ |
local.citation.author | Alonso-Arroyo, A.; Camps, A.; Monerris, S.; Rudiger, C.; Walker, J.; Onrubia, R.; Querol, J.; Park, H.; Pascual, D. |
local.citation.publicationName | IEEE journal of selected topics in applied earth observations and remote sensing |
local.citation.volume | 9 |
local.citation.number | 12 |
local.citation.startingPage | 5862 |
local.citation.endingPage | 5879 |
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