English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/94117
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 1 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Impact of the Local Oscillator calibration on the SMOS sea surface Salinity maps

Autor Gabarró, Carolina ; González, Verónica ; Martínez, Justino ; Guimbard, Sébastien ; Gourrion, Jérôme ; Piles, María ; Portabella, Marcos ; Font, Jordi
Fecha de publicación 2012
EditorInstitute of Electrical and Electronics Engineers
Citación Geoscience and Remote Sensing Symposium (IGARSS): 2613-2616 (2012)
ResumenThe Local Oscillators (LO) of the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS) onboard the Soil Moisture and Ocean Salinity (SMOS) satellite are used to maintain the operating frequency of the 69 receivers. The phase of the LO drifts over time, in turn blurring the MIRAS brightness temperature (TB) measurements. After a pre-launch assessment, it was decided to calibrate the LO every 10 minutes to reduce the phase drifts. During short periods of the first 2.5 years of SMOS mission, the LO calibration has been performed every 2 minutes to assess the impact of a higher calibration frequency on the quality of the data. In this study, relative differences (10-min TBs versus 2-min TBs) of about 0.3 K are shown, which lead to non-negligible relative differences of about 0.2-0.3 practical salinity units (psu) in the retrieved sea surface salinity (SSS). However, when performing independent validation against Argo float SSS data at Level 3 (spatio-temporally averaged SSS products), no significant differences are found between 10-min and 2-min data. This is due to the fact that current SMOS SSS accuracy (relative to Argo) is about 0.6-0.8 psu, thus masking the relatively smaller LO calibration frequency effect
Descripción IEEE International Geoscience and Remote Sensing Symposium (IGARSS): Remote Sensing for a Dynamic Earth, 22-27 July 2012, Munich, Germany
Versión del editorhttp://dx.doi.org/10.1109/IGARSS.2012.6350940
URI http://hdl.handle.net/10261/94117
DOI10.1109/IGARSS.2012.6350940
Identificadoresdoi: 10.1109/IGARSS.2012.6350940
isbn: 978-1-4673-1160-1
issn: 2153-6996
Aparece en las colecciones: (UTM) Libros y partes de libros
(ICM) Libros y partes de libros
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.