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Interferometric Synthetic Aperture Radar (InSAR): Its past, present and future / Zhong Lu in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 3 (March 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 3 (March 2007) . - pp 217 - 221 Titre : Interferometric Synthetic Aperture Radar (InSAR): Its past, present and future Type de document : Article/Communication Auteurs : Zhong Lu, Auteur ; O. Kwoun, Auteur ; R. Rykhus, Auteur Année de publication : 2007 Article en page(s) : pp 217 - 221 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] déformation de surface [Termes IGN] détection de changement [Termes IGN] image INSAT-VHRR [Termes IGN] image radar moirée [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] mouvement de terrain [Termes IGN] risque naturel [Termes IGN] surveillance géologique Résumé : (Documentaliste) Cet article présente la technologie interférométrique. Après un bref historique, sont présentées les différentes applications où l'interférométrie est très utile et performante, comme la surveillance de volcans, de glaciers ou autres risques naturels. Liée à d'autres technologies telles que la polarimétrie, l'analyse exploratoire des données et le traitement en grille, son utilisation apporterait des solutions aux problèmes posés par les risques naturels et la gestion des ressources naturelles. Numéro de notice : A2007-127 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://pubs.er.usgs.gov/publication/70157055 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28490 [article]

InSAR imaging of volcanic deformation over cloud-prone areas: Aleutian islands / Zhong Lu in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 3 (March 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 3 (March 2007) . - pp 245 - 257 Titre : InSAR imaging of volcanic deformation over cloud-prone areas: Aleutian islands Type de document : Article/Communication Auteurs : Zhong Lu, Auteur Année de publication : 2007 Article en page(s) : pp 245 - 257 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] Alaska (Etats-Unis) [Termes IGN] archipel [Termes IGN] déformation de la croute terrestre [Termes IGN] détection de changement [Termes IGN] éruption volcanique [Termes IGN] image INSAT-VHRR [Termes IGN] image radar moirée [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] modèle numérique de terrain [Termes IGN] volcan Résumé : (Auteur) Interferometric synthetic aperture radar (INSAR) is capable of measuring ground-surface deformation with centimeter-to-subcentimeter precision and spatial resolution of tens-of-meters over a relatively large region. With its global coverage and all-weather imaging capability, INSAR is an important technique for measuring ground-surface deformation of volcanoes over cloud-prone and rainy regions such as the Aleutian Islands, where only less than 5 percent of optical imagery is usable due to inclement weather conditions. The spatial distribution of surface deformation data, derived from INSAR images, enables the construction of detailed mechanical models to enhance the study of magmatic processes. This paper reviews the basics of INSAR for volcanic deformation mapping and the INSAR studies of ten Aleutian volcanoes associated with both eruptive and non-eruptive activity. These studies demonstrate that all-weather INSAR imaging can improve our understanding of how the Aleutian volcanoes work and enhance our capability to predict future eruptions and associated hazards. Copyright ASPRS Numéro de notice : A2007-129 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.3.245 En ligne : https://doi.org/10.14358/PERS.73.3.245 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28492 [article]

Study of rain events over the South China Sea by synergistic use of multi-sensor satellite and ground-based meteorological data / W. Alpers in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 3 (March 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 3 (March 2007) . - pp 267 - 278 Titre : Study of rain events over the South China Sea by synergistic use of multi-sensor satellite and ground-based meteorological data Type de document : Article/Communication Auteurs : W. Alpers, Auteur ; C. Cheng, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 267 - 278 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Chine [Termes IGN] données météorologiques [Termes IGN] image DMSP-SSM/I [Termes IGN] image Envisat-ASAR [Termes IGN] image GOES [Termes IGN] image multicapteur [Termes IGN] image QuikSCAT [Termes IGN] image TRMM-MI [Termes IGN] précipitation [Termes IGN] signature spectrale [Termes IGN] surface de la mer Résumé : (Auteur) Rain cells and rain bands over the South China Sea off the coast of Hong Kong are studied by using multi-sensor satellite and ground-based meteorological data. These include synthetic aperture radar (SAR) images acquired by the Advanced Synthetic Aperture Radar (ASAR) onboard the European ENVISAT satellite, weather radar images from the Hong Kong Observatory (HKO), rain rate data acquired by the Special Sensor Microwave Imager (SSM/I) sensor onboard the F15 satellite of the American Defense Meteorological Satellite Program (DMSP) and the rain sensors onboard the Tropical Rainfall Measurement Mission (TRMM) satellite, cloud image of GOES-9 satellite, sea surface wind maps acquired by the scatterometer onboard the QUIKSCAT satellite, and meteorological data from weather stations in Hong Kong. Three rain events, typical of Hong Kong, are studied. The first event consists of a cluster of rain cells associated with the summer monsoon, the second one of rain cells aligned in a rain band generated by an upper-air trough, and the third one consists of small rain cells embedded in a cold front. It is shown that ASAR images, which have a resolution of 30 m in the Image Mode (IM) and 150 m resolution in the Wide Swath Mode (WSM), yield much more detailed information on the spatial structure of rain events over the ocean than data obtained from SSSM/I and the rain sensors onboard the TRMM satellite. The precipitation radar (PR) onboard TRMM, which is the rain measuring instrument flown in space with the next best resolution, has a resolution of only 4 km. However, the disadvantage of SAR is that it is sometimes difficult to identify SAR signatures visible on SAR images of the sea surface unambiguously as caused by rain events. By comparing SAR images with simultaneously acquired weather radar images of the Hong Kong Observatory, a better knowledge of radar signatures on SAR images resulting from rain events over the ocean is obtained. This knowledge then helps greatly in detecting rain events on SAR images which are acquired over ocean areas, which are not in the reach of weather radar stations. SAR images containing radar signature of rain events allow a much more detailed study of fine-scale structures of rain events over the World’s ocean, in particular of clusters of rain cells, than any other sensor presently flown in space. Copyright ASPRS Numéro de notice : A2007-130 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.3.267 En ligne : https://doi.org/10.14358/PERS.73.3.267 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28493 [article]

LUCC impact on sediment loads in sub-tropical rainy areas / X. Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 3 (March 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 3 (March 2007) . - pp 319 - 327 Titre : LUCC impact on sediment loads in sub-tropical rainy areas Type de document : Article/Communication Auteurs : X. Chen, Auteur ; S. Bao, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 319 - 327 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] agriculture [Termes IGN] analyse spatiale [Termes IGN] bassin hydrographique [Termes IGN] changement d'occupation du sol [Termes IGN] Chine [Termes IGN] couvert forestier [Termes IGN] lac [Termes IGN] sédimentation [Termes IGN] surface cultivée [Termes IGN] système d'information géographique [Termes IGN] utilisation du sol [Termes IGN] zone tropicale humide Résumé : (Auteur) In this paper, we evaluate the impacts of land-use/cover changes (LUCC) on sediment loads at the outlets of five sub watersheds of the Poyang Lake watershed by integrating remote sensing and GIS with statistical analysis. The intensively farmed watershed is characterized by a mountainous and hilly topography and a rainy climate. The primary goal of this paper is to help a better understanding of land-use/cover change and its driving forces. We discuss spatio temporal variations in rainfall and sediment loads and identify factors contributing to those variations, analyze the comprehensive impacts of land-use/cover change on changing climate and human activities, and conclude that the changing rates of forest cover and climate regimes are primary factors for sediment discharges in the Poyang Lake watershed. Our results suggest that the eco-system still have large capacities to support human activities in the area. Copyright ASPRS Numéro de notice : A2007-131 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.73.3.319 En ligne : https://doi.org/10.14358/PERS.73.3.319 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28494 [article]