Results 21 to 30 of about 369,559 (294)

Revisión de la utilización de distintos índices espectrales y técnicas para la cartografía de área quemada en imágenes MODIS

Espacio, Tiempo y Forma. Serie VI, Geografía, 2008
En los últimos años se han desarrollado y analizado numerosas técnicas e índices para realizar la cartografía de áreas quemadas a escala regional.
Felipe Oliva, Patricia Verdú
doaj   +1 more source

Towards Spectral Classification of L and T Dwarfs: Infrared and Optical Spectroscopy and Analysis [PDF]

, 2001
We present 0.6-2.5um, R~400 spectra of twenty-seven cool, low luminosity stars and substellar objects. Based on these and previously published spectra we develop a preliminary spectral classification system for L and T dwarfs.
Anderson, S, Brinkmann, J, Csabai, I, Fan, X, Geballe, T R, Golimowski, D A, Gunn, J E, Hawley, S L, Hennessy, G, Henry, T J, Hill, G J, Hindsley, R B, Ivezic, Z, Knapp, G R, Leggett, S K, Lupton, R H, Mcdaniel, A, Munn, J A, Narayanan, V K, Peng, E, Pier, J R, Rockosi, C M, Schneider, D P, Smith, J A, Strauss, M A, Tsvetanov, Z I, Uomoto, A, York, D G, Zheng, W   +28 more
core   +2 more sources

THE EFFECT OF SYSTEMATICS ON POLARIZED SPECTRAL INDICES [PDF]

The Astrophysical Journal, 2013
We study four particularly bright polarized compact objects (Tau A, Virgo A, 3C273 and Fornax A) in the 7-year WMAP sky maps, with the goal of understanding potential systematics involved in estimation of foreground spectral indices. We estimate the spectral index, the polarization angle, the polarization fraction and apparent size and shape of these ...
I. K. Wehus, U. Fuskeland, H. K. Eriksen
openaire   +2 more sources

Land cover classification using multi-temporal MERIS vegetation indices [PDF]

, 2007
The spectral, spatial, and temporal resolutions of Envisat's Medium Resolution Imaging Spectrometer (MERIS) data are attractive for regional- to global-scale land cover mapping.
A. Mathur, Baret F., Benedetti R., Clark R. N., Clevers J. G. P. W., G. M. Foody, Gaston G. G., Gobron N., Halldorsson G. H., J. Dash, J. W. Chipman, Lillesand T. M., Mather P. M., P. J. Curran, Peterson D. L., Richardson A. L., Smith G. M., Smith P. M., T. M. Lillesand, Wilkinson G. G.   +19 more
core   +1 more source

The ATLAS 5.5 GHz survey of the Extended Chandra Deep Field South: Catalogue, Source Counts and Spectral Indices [PDF]

, 2012
Star forming galaxies are thought to dominate the sub-mJy radio population, but recent work has shown that low luminosity AGN can still make a significant contribution to the faint radio source population.
A. M. Hopkins, Afonso, Altschuler, Balestra, Bertin, Blundell, Bondi, Cardamone, Ciliegi, Condon, Condon, Condon, De Breuck, De Breuck, De Breuck, Dehghan, Donnelly, Driver, E. Lenc, E. Middelberg, Fanti, Fomalont, Georgakakis, Hopkins, Huynh, Huynh, Huynh, Ibar, Jarvis, K. E. Randall, Kapahi, Kellermann, Ker, Klamer, Kormendy, M. T. Huynh, M. Y. Mao, Magorrian, Miller, Miller, Muxlow, Norris, Norris, O'Dea, O'Dea, Owen, Padovani, Padovani, Peacock, Prandoni, Prandoni, R. P. Norris, Randall, Randall, Rowan-Robinson, Röttgering, Sault, Schinnerer, Schinnerer, Seymour, Seymour, Smolčić, Snellen, Taylor, Tielens, Tinti, Vanzella, Wall, Whiting, Wilson, Windhorst, Windhorst, Windhorst, Wolf, Wrobel   +74 more
core   +2 more sources

Primordial spectral indices from generalized Einstein theories [PDF]

Physical Review D, 1995
31 pp. Forthcoming in Physical Review D. Section 3 significantly revised.
openaire   +3 more sources

Evaluation of Spectral Indices to Detect the Thickness of Oil Slicks in Persian Gulf Using Satellite Images [PDF]

محیط زیست و مهندسی آب, 2023
Usually, the methods used to identify oil slicks work to identify different slick parts in terms of thickness. Since the spectrum of oil slicks is affected by seawater and the physical and chemical properties of the oil, in this study, using the spectral
Saeed Mahmodizadeh, Hassan Yousefi, Hamed Deldar   +2 more
doaj   +1 more source

Using RPAS Multi-Spectral Imagery to Characterise Vigour, Leaf Development, Yield Components and Berry Composition Variability within a Vineyard

Remote Sensing, 2015
Implementation of precision viticulture techniques requires the use of emerging sensing technologies to assess the vineyard spatial variability. This work shows the capability of multispectral imagery acquired from a remotely piloted aerial system (RPAS),
Clara Rey-Caramés, María P. Diago, M. Pilar Martín, Agustín Lobo, Javier Tardaguila   +4 more
doaj   +1 more source

Spectral Variations in Early-Type Galaxies as a Function of Mass [PDF]

, 2000
We report on the strengths of three spectral indicators - Mg_2, Hbeta, and Hn/Fe - in the integrated light of a sample of 100 field and cluster E/S0 galaxies.
Caldwell, N., Concannon, K. D., Rose, J. A.   +2 more
core   +3 more sources

An Enhanced IT2FCM* Algorithm Integrating Spectral Indices and Spatial Information for Multi-Spectral Remote Sensing Image Clustering

Remote Sensing, 2017
Interval type-2 fuzzy c-means (IT2FCM) clustering methods for remote-sensing data classification are based on interval type-2 fuzzy sets and can effectively handle uncertainty of membership grade.
Jifa Guo, Hongyuan Huo
doaj   +1 more source