Bibliografie tematiche / Satellite spots

Letteratura scientifica selezionata sul tema "Satellite spots"

Autore: Grafiati

Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Satellite spots":

Hanley, Kipp. "Satellite Technology Spots Distribution System Leaks". Opflow 46, n. 4 (aprile 2020): 24–25. http://dx.doi.org/10.1002/opfl.1353.

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Pilyugin, L. S., B. Cedrés, I. A. Zinchenko, A. M. Pérez Garcia, M. A. Lara-López, J. Nadolny, Y. A. Nefedyev et al. "MaNGA galaxies with off-centered spots of enhanced gas velocity dispersion". Astronomy & Astrophysics 653 (settembre 2021): A11. http://dx.doi.org/10.1051/0004-6361/202141012.

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Off-centered spots of the enhanced gas velocity dispersion, σ, are revealed in some galaxies from the Mapping Nearby Galaxies at Apache Point Observatory survey (MaNGA). Aiming to clarify the origin of the spots of enhanced σ, we examine the distributions of the surface brightness, the line-of-sight velocity, the oxygen abundance, the gas velocity dispersion, and the Baldwin-Phillips-Terlevich spaxel classification in seven galaxies. We find that the enhanced σ spots in six galaxies can be attributed to a (minor) interaction with a satellite. Three galaxies in our sample have a very close satellite (the separation in the sky plane is comparable to the optical radius of the galaxy). The spots of enhanced σ in those galaxies are located at the edge of the galaxy close to the satellite. The spots of enhanced σ in three other galaxies are related to bright spots in the photometric B band within the galaxy, which can be due to the projection of a satellite in the line of sight of the galaxy. The oxygen abundances in the spots in these three galaxies are reduced. This suggests that the low-metallicity gas from the satellite is mixed with the interstellar medium of the disk, that is, the gas exchange between the galaxy and its satellite takes place. The spectra of the spaxels within a spot are usually H II-region-like, suggesting that the interaction (gas infall) in those galaxies does not result in appreciable shocks. In contrast, the spot of the enhanced σ in the galaxy M-8716-12703 is associated with an off-centered active galactic nucleus-like radiation distribution. One can suggest that the spot of the enhanced σ in the M-8716-12703 galaxy is different in origin, or that the characteristics of gas infall in this case differs from that in other galaxies.

Zhang, Jia Hua, e Feng Mei Yao. "Advance in Monitoring Forest Fire in China Based on Multi-Satellite Data". Advanced Materials Research 518-523 (maggio 2012): 5668–72. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5668.

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The advance in monitoring forest fire in China based on multi-Satellite data were discussed in the paper. Since the 1980s in China, the satellite remotely-sensed data have been acquired, such as NOAA/AVHRR, FY-series, MODIS, CBERS, and ENVISAT, have been widely utilized for monitoring forest fire hot spots and burned areas in China. Some developed algorithms have been utilized for detecting the forest fire hot spots.

Goguen, J. D., W. M. Sinton, D. L. Matson, R. R. Howell, H. M. Dyck, T. V. Johnson, R. H. Brown et al. "Io hot spots: Infrared photometry of satellite occultations". Icarus 76, n. 3 (dicembre 1988): 465–84. http://dx.doi.org/10.1016/0019-1035(88)90015-2.

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Stokel-Walker, Chris. "AI spots possible archaeological sites in satellite images". New Scientist 257, n. 3427 (febbraio 2023): 9. http://dx.doi.org/10.1016/s0262-4079(23)00323-8.

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Zhang, Hongbo, Ke Wang e Xiaoyu Shang. "High time effective detection strategy for geosynchronous orbital space debris". Journal of Physics: Conference Series 2764, n. 1 (1 maggio 2024): 012087. http://dx.doi.org/10.1088/1742-6596/2764/1/012087.

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Abstract After the formation of a multi-satellite network in a hypersynchronous orbit, it has the ability to continuously and in real-time observe the GEO band, which is an ideal way to solve blind spots and semi-backlight observations and improve the system’s high time-effective coverage ability. In response to the application limitations of high-orbit real-time monitoring constellations in hypersynchronous orbits, such as the large number of satellites in the network, high requirements for satellite detection capability, large field of view, and high launch and orbit cost, this paper proposes a constellation system efficiency analysis method that comprehensively covers both time and space dimensions. Based on this, optimization analysis of satellite detection capability, detection field of view, number of satellites, and orbit height is carried out. Finally, three constellation optimization schemes are provided, which are a semi-major axis of 60000 km with seven satellites, a semi-major axis of 55000 km with eight satellites, and a semi-major axis of 50000 km with ten satellites. The three constellation optimization schemes can provide a reference for the development of space-based high-orbit situational awareness in the future.

Mupfiga, Upenyu Naume, Onisimo Mutanga, Timothy Dube e Pedzisai Kowe. "Spatial Clustering of Vegetation Fire Intensity Using MODIS Satellite Data". Atmosphere 13, n. 12 (25 novembre 2022): 1972. http://dx.doi.org/10.3390/atmos13121972.

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This work analyses the spatial clustering of fire intensity in Zimbabwe, using remotely sensed Moderate Resolution Imaging Spectroradiometer (MODIS) active fire occurrence data. In order to investigate the spatial pattern of fire intensity, MODIS-derived fire radiative power (FRP) was utilized. A local indicator of spatial autocorrelation method, the Getis-Ord (Gi*) spatial statistic, was applied to show the spatial distribution of high and low fire intensity clusters. Analysis of the relationship between topographic variables, vegetation type, agroecological zones and fire intensity was done. According to the study’s findings, the majority (44%) of active fires detected in the study area in 2019 were of low-intensity (cold spots), and the majority (49.3%) of them occurred in shrubland. High-intensity fires (22%) primarily occurred in the study area’s eastern and western regions. The study findings demonstrate the utility of spatial statistics methods in conjunction with satellite fire data in detecting clusters of high and low-intensity fires (hot spots and cold spots).

Wang, N., e R. Yang. "THE APPLICATION OF CHINESE HIGH-SPATIAL-RESOLUTION REMOTE SENSING SATELLITE IMAGE IN LAND LAW ENFORCEMENT INFORMATION EXTRACTION". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (30 aprile 2018): 1751–55. http://dx.doi.org/10.5194/isprs-archives-xlii-3-1751-2018.

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Chinese high -resolution (HR) remote sensing satellites have made huge leap in the past decade. Commercial satellite datasets, such as GF-1, GF-2 and ZY-3 images, the panchromatic images (PAN) resolution of them are 2&thinsp;m, 1&thinsp;m and 2.1&thinsp;m and the multispectral images (MS) resolution are 8&thinsp;m, 4&thinsp;m, 5.8&thinsp;m respectively have been emerged in recent years. Chinese HR satellite imagery has been free downloaded for public welfare purposes using. Local government began to employ more professional technician to improve traditional land management technology. This paper focused on analysing the actual requirements of the applications in government land law enforcement in Guangxi Autonomous Region. 66 counties in Guangxi Autonomous Region were selected for illegal land utilization spot extraction with fusion Chinese HR images. The procedure contains: A. Defines illegal land utilization spot type. B. Data collection, GF-1, GF-2, and ZY-3 datasets were acquired in the first half year of 2016 and other auxiliary data were collected in 2015. C. Batch process, HR images were collected for batch preprocessing through ENVI/IDL tool. D. Illegal land utilization spot extraction by visual interpretation. E. Obtaining attribute data with ArcGIS Geoprocessor (GP) model. F. Thematic mapping and surveying. Through analysing 42 counties results, law enforcement officials found 1092 illegal land using spots and 16 suspicious illegal mining spots. The results show that Chinese HR satellite images have great potential for feature information extraction and the processing procedure appears robust.

Shiohara, Amane, Sergey M. Novikov, Diego M. Solís, José M. Taboada, Fernando Obelleiro e Luis M. Liz-Marzán. "Plasmon Modes and Hot Spots in Gold Nanostar–Satellite Clusters". Journal of Physical Chemistry C 119, n. 20 (10 dicembre 2014): 10836–43. http://dx.doi.org/10.1021/jp509953f.

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Bonfond, B., D. Grodent, S. V. Badman, J. Saur, J. C. Gérard e A. Radioti. "Similarity of the Jovian satellite footprints: Spots multiplicity and dynamics". Icarus 292 (agosto 2017): 208–17. http://dx.doi.org/10.1016/j.icarus.2017.01.009.

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Tesi sul tema "Satellite spots":

Morgan, Ryan S. "Volcanism on Io spectral modeling of volatile deposits near active hot spots /". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1663116511&sid=3&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Amorim, Emmanuel. "Arcs électriques sur panneaux solaires de satellite". École nationale supérieure de l'aéronautique et de l'espace (Toulouse ; 1972-2007), 2002. http://www.theses.fr/2002ESAE0011.

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Tout au long de leur durée de vie, les satellites sont en interaction constante avec l'environnement spatial. En orbite géostationnaire, les surfaces des satellites sont par exemple chargées par les particules de la magnétosphère, en particulier par les électrons. Récemment, des pertes de puissance ont été constatées sur certains satellites situés en orbite géostationnaire. Ces anomalies ont été corrélées avec des périodes d'environnement chargeant et s'expliqueraient par une décharge électrostatique "primaire" provoquant une "décharge secondaire" destructrice se produisant sur un panneau solaire de satellite. Nous avons réalisé une étude expérimentale où de nouveaux diagnostics spectroscopiques et optiques nous ont permis de déterminer avec certitude la nature de ces décharges et leurs conséquences. Ces caractérisations ont été effectuées sur des échantillons de cellules solaires réelles mais aussi sur des échantillons de laboratoire en cuivre, en zinc ou en argent. Ces deux phénomènes apparemment très différents sont de même nature : ce sont des arcs dans le vide. Ces deux types de décharges possèdent en effet les caractéristiques des arcs sous vide : courant d'arc supérieur à l'ampère, plasma de vapeurs métallique, cratères de métal fondu sur la surface de la cathode prouvant la présence de spots cathodiques. Les conditions d'initiation des arc secondaires ont été déterminées ainsi que l'évolution de leur durée de vie et des dommages en fonction des paramètres du circuit électrique et en fonction des échantillons.

Das, Sujata. "Automatic detection of roads in spot satellite images". Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80011.

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The improved spatial resolution of the data from the SPOT satellite provides a substantially better basis for monitoring urban land use and growth with remote sensing than Landsat data. The purpose of this study is to delineate the road network in 20-m resolution SPOT-images of urban areas automatically. The roads appear as linear features. However, most edge and line detectors are not effective in detecting roads in these images because of the low signal to noise ratio, low contrast and blur in the imagery. For the automatic recognition of roads, a new line detector based on surface modelling is developed. A line can be approximated by a piecewise straight curve composed of short linear line-elements, called linels, each characterized by a direction, a length and a position. The approach to linel detection is to fit a directional surface that models the ideal local intensity profile of a linel in the least square sense. A Gaussian surface with a direction of invariance forms an adequate basis for modelling the ideal local intensity profile of the roads. The residual of the least squares fit as well as the parameters of the fit surface characterize the linel detected. The reliable performance of this line operator makes the problems of linking linels more manageable.
Master of Science

Pébayle, Josée. "L'Intérêt en géographie des données du satellite Spot (à partir de simulations)". Paris 1, 1986. http://www.theses.fr/1986PA010536.

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Nominé, Anna V. "Synthesis of Bi₂O₂CO₃ nanosheets by electrical discharges in liquids for photocatalytic and nanoelectronic applications". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0357.

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Ce travail fournit des informations sur la synthèse de feuillets nanométriques ultrafins composés de Bi₂O₂CO₃, ci-après dénommé BOC. La synthèse est réalisée par une technique rapide et simple connue sous le signe EDDL correspondant au procédé de décharges électriques dans les liquides diélectriques. Pour assurer la reproductibilité de la synthèse, une méthode de prétraitement impliquant la gravure d'électrodes de bismuth avec du Nital a été employée. Le processus choisi consiste à initier des décharges électriques entre ces électrodes alors qu'elles sont immergées soit dans l'azote liquide, soit dans l'eau. Fait remarquable, les deux liquides conduisent à des nanostructures identiques, une similitude validée par spectroscopie d'émission optique, technique qui a permis de confirmer la nature métallique de la décharge dans les deux milieux. Après cette étape, les nanofeuillets subissent une oxydation et une carbonatation rapides lorsqu'ils sont exposés à l'air. Le mécanisme de croissance proposé est étroitement lié au mécanisme connu sous le nom de « ledge mechanism », en raison de la présence de « kinks » et de « jogs » clairement visibles le long des bords des nanofeuillets. Ces nanostructures bidimensionnelles émergent d'abord à la surface de la cathode et croissent ensuite verticalement. Cette croissance anisotrope est rendue possible par l'assistance ionique dans les régions qui ressemblent à des motifs en forme de peigne formés pendant l'étape de gravure chimique, condition préalable nécessaire à une forte reproductibilité du processus de croissance. La caractérisation cristallographique détaillée des nanofeuillets de BOC a été réalisée à l'aide d'une série de techniques, notamment la microscopie électronique en transmission (TEM), la microscopie électronique en transmission à balayage (STEM), la microscopie électronique en transmission à haute résolution (HRTEM), la spectroscopie de rayons X à dispersion d'énergie (EDX), la diffraction d'électrons en aire sélectionnée (SAED), la diffraction d'électrons en faisceau convergent (CBED), la microscopie électronique en transmission filtrée en énergie (EFTEM) et la spectroscopie de perte d'énergie des électrons (EELS). L'étude révèle que la structure cristallographique du BOC est conforme au groupe spatial I4/mmm, avec des paramètres de réseau a=3,91 Å et c=13,77 Å, une détermination qui a été confirmée par diffraction des rayons X (DRX). L'étude clarifie également l'origine potentielle des taches satellites qui sont régulièrement observées dans les motifs SAED le long de l'axe de zone [001]. Dans cette étude, ces taches ont été principalement attribuées à deux phénomènes : la diffraction multiple et les transformations locales ordre-désordre qui se produisent dans la structure cristalline du BOC. Cette transformation implique une transition d'une structure quadratique centrée vers un réseau primitif de Bravais. Afin d'évaluer leur utilité pratique, nous avons mesuré la performance photocatalytique des nanofeuillets de BOC synthétisés à l'aide de la méthode EDDL et nous avons constaté qu'elle était comparable à elle de BOCs obtenus par d'autres méthodes. En outre, nous avons évalué la performance électronique des BOC dans le but de découvrir leur potentiel dans les applications liées à des nanodispositifs
This work provides information on the synthesis of ultrathin nanosheets composed of Bi₂O₂CO₃, hereafter referred to as BOC. The synthesis is achieved through the rapid and straightforward technique known as Electrical Discharges in Dielectric Liquids (EDDL). To ensure the reproducibility of the synthesis, a pre-treatment method involving the etching of bismuth electrodes with Nital was employed. The chosen process entails initiating electrical discharges between these electrodes while submerged in either liquid nitrogen or water. Remarkably, both liquids produced identical nanostructures, a similarity validated by optical emission spectroscopy, which confirmed the metallic nature of the discharge in both environments. Following this stage, the nanosheets undergo rapid oxidation and carbonation upon exposure to air. The proposed growth mechanism is closely linked to the ledge mechanism, considering the presence of clearly visible kinks and jogs along the edges of the nanosheets. These two-dimensional nanostructures first emerge on the cathode's surface and then grow vertically. This anisotropic growth is made possible by ion assistance in regions that exhibit comb-like patterns formed during the chemical etching step, which is a necessary precondition for high reproducibility of the discharge process. Detailed crystallographic characterization of BOC nanosheets was achieved through a range of techniques, including Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM), High-Resolution TEM Transmission Electron Microscopy (HRTEM), Energy-Dispersive X-ray Spectroscopy (EDX), Selected Area Electron Diffraction (SAED), Convergent Beam Electron Diffraction (CBED), Energy Filtered Transmission Electron Microscopy (EFTEM), and Electron Energy-Loss Spectroscopy (EELS). The investigation reveals that the crystallographic structure of BOC conforms to the space group I4/mmm, with lattice parameters a=3.91 Å and c=13.77 Å, a determination that was confirmed by X-ray Diffraction (XRD). The study also clarifies the potential origin of satellite spots that are consistently observed in SAED patterns along the [001] zone axis. In this research, these spots were primarily attributed to two phenomena: multiple diffraction and local disorder-to-order transformations occurring within the BOC crystal structure. This transformation entails a transition from a body-centered tetragonal structure to a primitive Bravais lattice. To gauge their practical usefulness, we assessed the photocatalytic performance of BOC nanosheets synthesized using the EDDL method and found it to be consistent with BOC obtained through alternative methods. Furthermore, we explored the electronic performance of BOC with the goal of uncovering their potential in nanodevice applications

Bursais, Abdulmalek. "Accelerometry and Global Navigation Satellite Systems Derived Training Loads". Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3939.

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The objectives of this dissertation include 1) to review accelerometry and Global Navigation Satellite System (GNSS) derived measures used to monitor training load, 2) to investigate the validity and reliability of accelerometers (ACCs) to identify stepping events and quantify training load, 3) to assess the relationship between accelerometry and Global Navigation Satellite Systems (GNSS) derived measures in quantifying training load. In Study I, acceleration data was collected via two tri-axial ACC (Device A and Device B) sampling at 100Hz mounted closely together at the xiphoid process level. Each participant (n=30) performed two trials of straight-line walking, running, and sprinting on a 20m course. Device A was used to assess ACC validity to identify steps and the test-retest reliability of the instrument to quantify the external load. Device A and Device B were used to assess inter-device reliability. The reliability of accelerometry derived metrics Impulse Load (IL) and Magnitude g (MAG) were assessed. In Study II, known distance (DIST) was predicted via acceleration data collected by a tri-axial ACC sampling at 100Hz mounted at the xiphoid process level, simultaneously positional data collected using a triple GNSS unit sampling at 10Hz placed between scapulae. Each participant (n=30) walked different DIST around various movement constraints (small and large circles). Thirty distances were completed around each circle and ranged from 12.57–376.99m. In Study I, the instrument demonstrated a positive predictive value (PPV) of 96.98-99.41% and an agreement of 93.08-96.29% for step detection during all conditions. Good test-retest reliability was found with a coefficient of variation (CV) < 5% for IL and MAG during all locomotor conditions. Good inter-device reliability was also found for all locomotor conditions (IL and MAG CV < 5%). These results indicated that tri-axial ACCs are a valid and reliable tool used to identify steps and quantify external load when movement is completed at a range of speeds. In Study 2, all linear regression models performed well for both movement constraints (R2=0.922-0.999; RMSE=0.047-0.242, p

El-Hajjaji, Abdellah. "Traitement numérique en 3D d'un couple d'images stéréo du satellite SPOT". Rouen, 1993. http://www.theses.fr/1993ROUES028.

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L'objectif de notre recherche est d'extraire les altitudes h d'une scène donnée prise en image sous deux angles différents donnés par le satellite SPOT. Dans ce but nous avons modélisé le mouvement du satellite et de son système optique afin de transformer les deux images initiales en images épipolaires, ce qui nous permettra de réduire le temps d'appariement et de trouver les pixels homologues avec succès. Pour la mise en correspondance, nous avons utilisé une technique qui est à base de la corrélation et de la programmation dynamique. Cette méthode nous a permet d'apparier 96 % des pixels homologues avec une erreur inférieure à 5 mètres. Ce problème de mise en correspondance reste toujours ouvert
The aim of our research was to extract the level h of a precise landscape taken over two differents angles by the satellite SPOT. To do so, we have modelised the movement of the satellite and his optical system to transform the two first images in another one, epipolar which will allow us to reduce the matching time and to find with success the equivalent pixels. For the pairing, we have utilised a technic wich is based on the corrolation and of the dynamic programming. This method was very satisfactory and allow us to match 96 % of the equivalent pixels, with an error of less than 5 meters, but the original problem is still a matter of research for complimentary studing

NHUN, FAT BEATRICE. "Determination precise de l'orbite d'un satellite a suivi doppler et du champ de gravite de la terre : application au satellite spot2". Toulouse 3, 1991. http://www.theses.fr/1991TOU30110.

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La methode de calcul d'orbite precise s'appuie sur l'analyse des residus doppler generes a la suite d'un calcul classique. Elle est appliquee au cas du satellite spot2 suivi par le systeme doris. La precision atteinte est de 14 a 35 centimetres dans la direction radiale et de 8 a 32 centimetres dans la direction tangentielle. Par ailleurs, la frequence principale de l'erreur d'orbite a un cycle/revolution est bien corrigee. Notre methode permet de diminuer les residus doppler des methodes classiques de calcul d'orbite de 3-15 mm/s a 0. 8-1 mm/s. Ces residus sont suffisamment faibles pour permettre l'identificaiton des effets de propagation dans l'atmosphere. L'etape suivante qui est la restitution des accelerations perturbatrices et du champ de gravite de la terre se heurte a deux problemes, celui du lissage des residus doppler et celui de la determination imprecise du vecteur station-satellite pour des passages a haute culmination

Pébayle, Josée. "L'Intérêt en géographie des données du satellite Spot, à partir de simulation". Lille 3 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37600310h.

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Veillet, Isabelle. "Triangulation spatiale de bloc d'images SPOT". Observatoire de Paris, 1991. https://hal.archives-ouvertes.fr/tel-02095460.

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Outre la qualité de ses images, l'atout majeur du système SPOT est sa précision géométrique. Cette étude a pour objet d'évaluer l'apport d'une triangulation de bloc au traitement géométrique d'images SPOT, afin de traiter globalement la géométrie de l'ensemble des images d'un chantier de spatiocartographie. Tant l'intérêt réel du calcul de blocs que sa faisabilité sont ici démontrés. Au préalable, il est indispensable d'analyser la modélisation de la prise de vues SPOT. Une modélisation simple, robuste et proche de la réalité physique de la prise de vues SPOT est proposée. Avec un nombre restreint de points d'appui, l'exactitude obtenue reste inférieure à 10 mètres en planimétrie et 6 mètres en altimétrie, ce qui est conforme à la plupart des standards de cartographie à l'échelle du 1:50000. Sans point d'appui, une précision de 15 mètres a été obtenue sur des blocs couvrant 200 km x 200 km
Besides its image quality, the main advantage of Sport system is its geometric accuracy. The aim of this study is the evaluation of what block adjustment can bring to Spot images geometric processing, in order to process together all the images of a space mapping project. The actual advantage of this kind of computation is shown here. Before, a model of the image-ground relationship must be given. The proposed model is simple, robust and close to the physical image acquisition. With very few control points, the resulting accuracy is less than 10 meters in planimetry, and 6 meters in altimetry. These figures fit most standards of 1:50000 scale topographic maps. Without any ground control point, the accuracy is 15 meters on 200 km x 200 km area

Più fonti

Libri sul tema "Satellite spots":

Canada Centre for Remote Sensing. SPOT satellite information = Renseignements sur le satellite SPOT. [Ottawa, Ont.]: Energy, Mines and Resources, Canada Centre for Remote Sensing, 1986.

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Sensing, Canada Centre for Remote. SPOT satellite information. [Ottawa]: Energy, Mines and Resources, Canada Centre for Remote Sensing, 1986.

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N, Slater Philip, Society of Photo-optical Instrumentation Engineers. e Association nationale de la recherche technique., a cura di. Earth remote sensing using the landsat thematic mapper and spot sensor systems: 15-17 April 1986, Innsbruck, Austria. Bellingham, Wash., USA: The Society, 1986.

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Orun, Ahmet Bahadir. SPOT satellite imagery for topogrphic mapping. Oxford: Oxford Polytechnic, 1990.

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(Firm), SPOT Image, a cura di. Spot Image. Toulouse: Spot Image, 1988.

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Gastellu-Etchegorry, Jean-Philippe. Remote sensing with SPOT: An assessment of SPOT capability in Indonesia. Yogyakarta, Indonesia: Gadjah Mada University Press, 1988.

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Centre national d'études spatiales (France), a cura di. Spot 1, premiers résultats en vol =: Spot 1, first in-flight results. Toulouse: CEPADUES-Editions, 1987.

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Centre national d'études spatiales (France)., a cura di. Spot 1, utilisation des images, bilan, résultats =: Spot 1, image utilization, assessment, results. Toulouse, France: CEPADUES-Editions, 1988.

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Canada Centre For Remote Sensing. Spot Satellite Information. Systeme Pour L'observation de la Terre. S.l: s.n, 1986.

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Hubschman, Jacques. L' Europe vue de l'espace: 100 images du satellite SPOT. Paris: Solar, 1992.

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Capitoli di libri sul tema "Satellite spots":

Kawashima, Hideyuki, Chunyong Wang e Hiroyuki Kitagawa. "Extracting Hot Spots from Satellite Data". In Lecture Notes in Computer Science, 581–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31235-9_39.

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Harris, Andrew J. L., Luke P. Flynn, Ken Dean, Eric Pilger, Martin Wooster, Chris Okubo, Peter Mouginis-Mark et al. "Real-time satellite monitoring of volcanic hot spots". In Remote Sensing of Active Volcanism, 139–59. Washington, D. C.: American Geophysical Union, 2000. http://dx.doi.org/10.1029/gm116p0139.

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Farris, Claudia, Dario Giaiotti, Stefano Miniussi, Cristina Sgubin e Nicolò Tudorov. "An integrated approach for marine litter hot spots identification". In Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”, 221–33. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/979-12-215-0030-1.20.

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Marine litter is defined as any persistent, manufactured or processed solid material discarded, disposed of or abandoned in the marine and coastal environment, and it is among the most important environmental problems which are affecting the sea nowadays. In this work, we present an integrated approach to the marine litter hot spots identification. The results come from a coordinate activity of filed campaigns, satellite monitoring and numerical model simulations. The method has been applied on the Adriatic basin as part of the MARLESS INTERREG IT-HR project.

Melentyev, V., e V. I. Chernook. "Integrated Use Of Multispectral Satellite And Airborne Sensors As A Tool For Detecting Biological Hot Spots And Monitor Of Aquatic Environment Security". In Integration of Information for Environmental Security, 47–67. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6575-0_3.

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Melentyev, Vladimir V., e Vladimir I. Chernook. "Multi-spectral Satellite-Airborne Management of Ice Form Marine Mammals and Their Habitat in the Presence of Climate Change Using a “Hot Spots” Approach". In Spatial Complexity, Informatics, and Wildlife Conservation, 409–27. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-87771-4_22.

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Karasuwa, Abdulkareem, Jon Eastment e Ifiok Otung. "Interference Mitigation for Multi Spot Beam Satellite Communication Systems Incorporating Spread Spectrum". In Wireless and Satellite Systems, 156–66. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53850-1_16.

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Brachet, Gérard. "SPOT: The First Operational Remote Sensing Satellite". In Satellite Remote Sensing for Resources Development, 59–80. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-011-7364-3_3.

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Wang, Heng, Shijun Xie, Ganhua Ye e Bin Zhou. "Optimization of Joint Power and Bandwidth Allocation for Multiple Users in a Multi-spot-Beam Satellite Communication". In Wireless and Satellite Systems, 35–49. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93398-2_4.

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Priscoli, Francesco Delli. "Mobility Issues for a GEO Multi-Spot Satellite System with OBP Capabilities". In Mobile and Personal Satellite Communications 2, 108–14. London: Springer London, 1996. http://dx.doi.org/10.1007/978-1-4471-1516-8_9.

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Nickolai, Valentin, Florian Pfeffel e David Hart. "Developing a Sport Team's Global Fan Nation through Integrating Satellite Fan Segments". In Digital Marketing in Sports, 91–114. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003430353-8.

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Atti di convegni sul tema "Satellite spots":

Buchnev, A. A., A. V. Getling, V. A. Krovotyntsev e V. P. Pyatkin. "Visualization of the movements of natural objects based on remote sensing data". In Spatial Data Processing for Monitoring of Natural and Anthropogenic Processes 2021. Crossref, 2021. http://dx.doi.org/10.25743/sdm.2021.64.72.006.

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Methods of constructing vector fields of natural objects’ movements based on a series of consecutive satellite images are considered: cloud formations in the atmosphere based on a series of consecutive images obtained from geostationary satellites; water masses and ice fields based on a series of images from low-orbit satellites; using the example of the evolution of bipolar spots, the trajectories of trial corks in the Solar photosphere are constructed based on the data of sounders installed on heliophysical satellite observatories.

Alagha, Nader. "Adjacent Beams Resource Sharing to Serve Hot Spots". In 35th AIAA International Communications Satellite Systems Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-5410.

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Icolari, Vincenzo, Stefano Cioni, Pantelis-Daniel Arapoglou, Alberto Ginesi e Alessandro Vanelli-Coralli. "Flexible precoding for mobile satellite system hot spots". In ICC 2017 - 2017 IEEE International Conference on Communications. IEEE, 2017. http://dx.doi.org/10.1109/icc.2017.7996648.

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Ramirez, T., C. Mosquera, M. Caus, A. Pastore, N. Alagha e N. Noels. "Adjacent Beams Resource Sharing to Serve Hot Spots: A Rate-splitting Approach". In 36th International Satellite Communications Systems Conference (ICSSC2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.1685.

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Wang, Jason J., Abhijith Rajan, James R. Graham, Dmitry Savransky, Patrick J. Ingraham, Kimberly Ward-Duong, Jennifer Patience et al. "Gemini planet imager observational calibrations VIII: characterization and role of satellite spots". In SPIE Astronomical Telescopes + Instrumentation, a cura di Suzanne K. Ramsay, Ian S. McLean e Hideki Takami. SPIE, 2014. http://dx.doi.org/10.1117/12.2055753.

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Ng, Luke K. C., e Hui Kow Lim. "Defect density control on "satellite spots" or chemical stains for deep-UV resist process". In SPIE's 27th Annual International Symposium on Microlithography, a cura di Theodore H. Fedynyshyn. SPIE, 2002. http://dx.doi.org/10.1117/12.474268.

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Lehner, Susanne, Johannes Schulz-Stellenfleth, Andreas Niedermeier, Jochen Horstmann e Wolfgang Rosenthal. "Extreme Waves Detected by Satellite Borne Synthetic Aperture Radar". In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28293.

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Within the last 20 years at least 200 supercarriers have been lost, due to severe weather conditions. In many cases the cause of accidents is believed to be ‘rouge waves’, which are individual waves of exceptional wave height or abnormal shape. I situ measurements of extreme waves are scarce and most observations are reported by ship masters after the encounter. In this paper a global set of synthetic aperture radar (SAR) images is used to detect extreme ocean wave events. The data were acquired aboard the European remote sensing satellite ERS-2 every 200 km along the track. As the data are not available as a standard product of the Europea Space Agency (ESA), the radar raw data were focused to complex SAR images using the processor BSAR developed by the German Aerospace Center. The entire SAR data set covers 27 days representing 34000 SAR imagettes with a size of 5km×10km. Complex SAR data contain information on ocean wave height, propagation direction and grouping as well as on ocean surface winds. Combining all of this information allows to extract and locate extreme waves from complex SAR images on a global basis. Special algorithms have been developed to retrieve the following parameters from the SAR data: Wind speed and direction, significant wave height, wave direction, wave groups and their individual heights. The satellite ENVISAT launched in March 2002 acquires SAR data with an even higher sampling rate (every 100 km). It is expected that a long-term analysis of ERS and ENVISAT data will give new insight into the physical processes responsible for rogue wave generation. Furthermore, the identification of hot spots will contribute to the optimization of ship routes.

Cantinelli Sevillano, Lucas, Sigbjørn Sangesland, Tor Berge Gjersvik e Audun Faanes. "Evaluation of Stress Distribution in Subsea Wellheads Installed in Caisson". In SPE/IADC International Drilling Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/212553-ms.

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Abstract The wellhead is a pressure containing vessel at the top of well and acts as the mechanical connection between well and blowout preventer (BOP), or Christmas tree. Wellheads in subsea wells are subjected to dynamic loading, and consequently fatigue damage, whenever a riser connects a well to a floating vessel. This paper investigates the load distribution and stresses along the components of subsea wellheads installed in a caisson, as an alternative to mitigate wellhead fatigue. To prevent fatigue-related incidents, operators, suppliers, and classification societies have collaborated to improve the evaluation of wellhead fatigue. A detailed finite element model (FEM) of the wellhead is used to simulate the mechanical response of the system and calculate stress levels at relevant spots. The simulations presented in this study follow the industry's recommended practices to investigate the potential of reducing the loading on wellhead fatigue hot spots by having a caisson installed around the conductor. Different parameters were established to evaluate the sensitivity of the system's response and determine the optimal mechanical configuration. Caissons have been used to place the wellhead and the Christmas tree below the mudline level, as a protective measure against icebergs in Arctic regions and trawl nets in fishing areas. The results of the presented study case indicate that this practice may be of benefit to subsea wellheads in general. The interactions with the caisson and the thick cement ring between conductor and caisson near the mudline may alter the response of the wellhead to the environmental loads transferred by the riser. While the magnitude of the loading itself is not reduced, its distribution along the wellhead components is. As a result, stresses on wellhead spots particularly vulnerable to fatigue failure, such as welds, may be reduced, while stresses on other, less vulnerable, locations of the wellhead may increase, which still results in a net gain to the overall service life of the product. Installation of a subsea wellhead in a caisson is a potential fatigue mitigating measure applicable to new wells, either in satellite or clustered configuration. The industry's established experience with similar equipment may expedite the adoption of this measure.

Meygret, Aime, Magdeleine C. Dinguirard, Patrice J. Henry, Laurent Poutier, Sandrine Lafont e Philippe Hazane. "SPOT Histogram data base". In Satellite Remote Sensing III, a cura di Hiroyuki Fujisada, Guido Calamai e Martin N. Sweeting. SPIE, 1997. http://dx.doi.org/10.1117/12.265447.

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Duplaquet, Marie-Lise, e Eliane Cubero-Castan. "Updating cartographic models by Spot images interpretation". In Satellite Remote Sensing, a cura di Jacky Desachy. SPIE, 1994. http://dx.doi.org/10.1117/12.196728.

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