English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/141220
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Nonlinear Response in a Field Portable Spectroradiometer: Characterization and Effects on Output Reflectance

AutorPacheco-Labrador, Javier; Martín, M. Pilar
Palabras claveSpectroscopy
Nonlinearities
Fecha de publicación2014
EditorInstitute of Electrical and Electronics Engineers
CitaciónIEEE Transactions on Geoscience and Remote Sensing Volume: 52, Issue: 2, Feb. 2014, pp.: 920 - 928
ResumenWe report the characterization and correction of nonlinear responses of a commercial field portable spectroradiometer intended to be used to monitor vegetation physiology. Calibration of photoresponse allowed the successful correction of spectral data and the modeling of biases in reflectance at different levels of the dynamic range. Finally, the impact of nonlinearities on a spectral estimator of photosynthetic status, the photochemical reflectance index (PRI) is discussed. Significance of the biases proved that, although nonlinearity can potentially affect reflectance along most of the dynamic range of the instrument, experimental uncertainties can limit its impact. Nonlinearity biased PRI by affecting the reference band of the index and suggested unreal changes on plant physiology. Results show that nonlinearity could be a significant problem in field spectroscopy, especially in the case of spectroradiometers integrated in unattended systems to monitor vegetation responses to radiation. An automatic adjustment of integration time to reach only a certain level of the dynamic range may reduce nonlinearity effects, though may not always avoid them. We conclude that linearity characterization is necessary to understand impacts and correct potential biases.
Versión del editorhttp://dx.doi.org/10.1109/TGRS.2013.2245671
URIhttp://hdl.handle.net/10261/141220
DOI10.1109/TGRS.2013.2245671
E-ISSN1558-0644
Aparece en las colecciones: (CCHS-IEGD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
JPL_and_PM_TGRS2013.pdf1,23 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


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