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Auteur A. Chan |
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Functional relation of land surface albedo with climatological variables: a review on remote sensing techniques and recent research developments / S. A. Salleh in Geocarto international, vol 29 n° 1 - 2 (February - April 2014)
[article]
Titre : Functional relation of land surface albedo with climatological variables: a review on remote sensing techniques and recent research developments Type de document : Article/Communication Auteurs : S. A. Salleh, Auteur ; Z. Abd Latif, Auteur ; Biswajeet Pradhan, Auteur ; W. M. N. Wan Mohd, Auteur ; A. Chan, Auteur Année de publication : 2014 Article en page(s) : pp 147 - 163 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] albedo
[Termes IGN] analyse fonctionnelle (produit)
[Termes IGN] bilan radiatif
[Termes IGN] climatologie
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] données météorologiques
[Termes IGN] image satellite
[Termes IGN] modélisation radiométrique de prise de vue
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Surface albedo has been documented as one of the Essential Climate Variables (ECV) of the Global Climate Observing System (GCOS) that governs the Earth's Radiation Budget. The availability of surface albedo data is necessary for a comprehensive environmental modelling study. Thus, both temporal and spatial scale issues need to be rectified. This study reports about the availability of surface albedo data through in-situ and remote sensing satellite observations. In this paper, we reviewed the existing models for surface albedo derivation and various initiatives taken by related environmental agencies in order to understand the issues of climate with respect to surface albedo. This investigation evaluated the major activities on albedo-related research specifically for the retrieval methods used to derive the albedo values. Two main existing albedo measurement methods are derived through in-situ measurement and remotely sensed observations. In-situ measurement supported with number of instruments and techniques such aspyrheliometers, pyranometers and Baseline Surface Radiation Network (BSRN) and remotely sensed observations using angularly integrated Bi-directional Reflectance Distribution Function (BRDF) by both geostationary and polar orbit satellites. The investigation results reveals that the temporal and spatial scaling is the major issues when the albedo values are needed for microclimatic study, i.e. high-resolution time-series analyses and at heterogeneity and impervious surface. Thus, an improved technique of albedo retrieval at better spatial and temporal scale is required to fulfil the need for such kind of studies. Amongst many others, there are two downscaling methods that have been identified to be used in resolving the spatial scaling biased issues: Smoothing Filter-based Intensity Modulation (SFIM) and Pixel Block Intensity Modulation (PBIM). The temporal issues can be resolved using the multiple regression techniques of land surface temperature, selected air quality parameters, aerosol and daily skylight. Numéro de notice : A2014-236 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2012.748831 Date de publication en ligne : 06/02/2013 En ligne : https://doi.org/10.1080/10106049.2012.748831 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33139
in Geocarto international > vol 29 n° 1 - 2 (February - April 2014) . - pp 147 - 163[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Engineering surveying for the construction of railway tunnels in Hong Kong / S. Lam in Geomatica, vol 65 n° 2 (June 2011)
[article]
Titre : Engineering surveying for the construction of railway tunnels in Hong Kong Type de document : Article/Communication Auteurs : S. Lam, Auteur ; A. Chan, Auteur Année de publication : 2011 Article en page(s) : pp 167 - 174 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Hong-Kong
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] lever topométrique
[Termes IGN] norme
[Termes IGN] qualité totale
[Termes IGN] surveillance d'ouvrage
[Termes IGN] système de référence géodésique
[Termes IGN] tunnel
[Termes IGN] voie ferréeRésumé : (Auteur) This paper provides an overview of the accuracy standards, specifications, and recent advances of engineering survey operations for the design and construction of railway tunnels in Hong Kong. It covers geodetic control, deformation monitoring surveys, detail mapping, geometric modelling, setting-out, as-built surveys and total quality management (TQM). Recent advances include an integrative approach to: (1) combine measurements collected by geodetic and geotechnical systems including interferometric synthetic aperture radar (InSAR) in monitoring ground displacements and structural deformation at local and regional scales; (2) map geospatial data into computer aided design (CAD) formats and geographic information systems (GIS) by both conventional and mobile surveying systems; (3) collect as-built data of railway tracks and tunnels by positioning instruments, track sensors and laser scanners together; (4) incorporate Outsource Plan into the TQM system under ISO 9001:2008. Numéro de notice : A2011-541 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.5623/cig2011-025 En ligne : https://doi.org/10.5623/cig2011-025 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31435
in Geomatica > vol 65 n° 2 (June 2011) . - pp 167 - 174[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 035-2011021 RAB Revue Centre de documentation En réserve L003 Disponible