Thèses sur le sujet « Satellite estimates »
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Enbäck, Henrik, et Charlotta Eriksson. « Hybrid Rainfall Estimates from Satellite, Lightning and Ground Station Data in West Africa ». Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-254757.
Texte intégralMajoriteten av Ghanas befolkning arbetar inom jordbrukssektorn. Det är viktigt för jordbrukarna att veta när och var nederbörd kommer att falla för att deras skörd inte ska bli förstörd av till exempel torka eller översvämningar. Det behövs därför bättre nederbördsprognoser för ett hållbart jordbruk. Ett sätt att få mer noggranna prognoser är att förbättra initialvärden till nederbördsmodellerna. Vid de mellersta breddgraderna på norra halvklotet används nederbördsmätningar från in-situ stationer samt data från radarsystem som initialvärden, men på grund av få mätstationer och inget radarsystem i västra Afrika behövs alternativa nederbördsestimater. Nederbörden i västra Afrika domineras av konvektiva system, vars regnmängd är kopplad till dess vertikala struktur. Satellitmätningar av molntoppstemperaturen och mikrovågornas spridning och absorption, liksom antalet blixtar är också relaterat till molnets struktur och kan därför användas för att estimera nederbördsmängden. I den här rapporten analyserades nederbördsestimater från satellitdata samt användning av blixtdata för att undersöka hur bra metoderna är på att estimera den verkliga nederbördsmängden. Satellitdataseten som analyserades var NOAA RFE2.0, NOAA ARC2 och EUMETSAT MPE. Dataseten jämfördes med in-situ mätningar från GTS-stationer samt observationerfrån NGO-samarbetande jordbrukare för att verifiera vilket satellitdataset som ger det bästa nederbördsestimatet, alternativt att en kombination mellan två eller alla dataset ger det bästa estimatet. Vidare har blixtdata från Vaisala GLD360 jämförts med GTS-stationer och RFE2.0 för att se om antalet blixtar är relaterat till nederbördsmängden. Slutligen har det också undersökts om en kombination mellan satellit- och blixtdata är ett bättre än de två metoderna separat. Nederbördsestimater från RFE2.0 visade på bäst korrelation med både GTS- och NGO-stationer. En tydlig skillnad noterades dock i RFE2.0:s förmåga att estimera nederbörd vid jämförelse mellan de två stationsdataseten. En bättre korrelation mellan RFE2.0 och GTS-stationerna påvisades, troligen för att RFE2.0 använder dessa observationer i uppbyggnaden av datasetet. Även om RFE2.0 visade på bäst korrelation i jämförelse med ARC2 och MPE var samtliga satellitdataset dåliga på att estimera den verkliga nederbördsmängden. De underestimerar starkt stora mängder nederbörd samtidigt som de överestimerar små mängder. Anledningen är troligen det relativt enkla antagandet att molntoppstemperaturen är direkt kopplad till molnets regnmängd samt den dåliga tidsupplösningen på de polära satelliterna som är utrustade med mikrovågssensorer. För att satellitdataseten ska kunna användas som ett alternativt nederbördsestimat i Västafrika behövs bättre mätinstrument och algoritmer. Vid analysen mellan GLD360 och GTS-stationer kunde, på grund av för få stationsdata, endast övergripande resultat erhållas. Ett områdesberoende gick dock att urskilja som vid en ytterligare analys mellan GLD360 och RFE2.0 visade på ett större säsongsberoende, särskilt under uppbyggnaden av monsunperioden i april och maj. Eftersom RFE2.0 visade sig ha dåliga nederbördsestimat kunde ingen noggrann koppling hittas, utan resultatet visade på trender samt möjligheter att kunna använda blixtdata som ett alternativt nederbördsestimat. Till exempel visade det sig att GLD360 kunde användas som ett verktyg för att sålla bort falsk nederbörd från satellitestimat samt identifiera trajektorien för ett konvektivt system. För en djupare analys i att relatera blixtar och nederbörd i Västafrika krävs bättre tekniker för att estimera nederbörd eller fler in-situ observationer.
Mote, Shekhar Raj. « EVALUATION OF STATE-OF-THE-ART PRECIPITATION ESTIMATES : AN APPROACH TO VALIDATE MULTI-SATELLITE PRECIPITATION ESTIMATES ». OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2364.
Texte intégralSmolinski, Steven P. « Marine boundary layer depth and relative humidity estimates using multispectral satellite measurements ». Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23069.
Texte intégralTeo, Chee-Kiat. « Application of satellite-based rainfall estimates to crop yield forecasting in Africa ». Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434333.
Texte intégralMargulis, Steven A. (Steven Adam) 1973. « Temporal disaggregation of satellite-derived monthly precipitation estimates for use in hydrologic applications ». Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/17453.
Texte intégralHorvath, Akos. « Differences between satellite measurements and theoretical estimates of global cloud liquid water amounts ». Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280553.
Texte intégralAthey, Ashley Taylor. « Verification of Satellite Derived Precipitation Estimates Over Complex Terrain : A Ground Truth Analysis for Nepal ». Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52917.
Texte intégralMaster of Science
Hyzer, Garrett. « Effects of GPS Error on Animal Home Range Estimates ». Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4338.
Texte intégralRobertson, Noel Arthur. « Model-based and satellite estimates of snow hydrology and carbon fluxes at high latitudes ». Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555106.
Texte intégralOliveira, Rômulo Augusto Jucá. « Characteristics and error modeling of GPM satellite rainfall estimates during CHUVA campaign in Brazil ». Instituto Nacional de Pesquisas Espaciais (INPE), 2017. http://urlib.net/sid.inpe.br/mtc-m21b/2017/05.22.17.16.
Texte intégralEstudos que investigam e avaliam a qualidade, limitações e incertezas das estimativas de precipitação de satélites são fundamentais para assegurar o uso correto e bem-sucedido desses produtos em aplicações, como estudos climáticos, modelagem hidrológica e monitoramento de desastres naturais. Em regiões do globo que não possuem observações in situ, esses estudos apenas são possíveis através de campanhas intensivas de medição de campo, que oferecem uma gama de medições de superfície de alta qualidade, por exemplo, CHUVA (Cloudprocesses of tHe main precipitation systems in Brazil: A contribUtion to cloud re-solVing modeling and to the GlobAl Precipitation Measurement) e GoAmazon (Observations and Modeling of the Green Ocean Amazon) sobre a Amazônia Brasileira durante 2014/2015. Este estudo tem como objetivo avaliar as incertezas provenientes da constelação de satélites do Global Precipitation Measurement (GPM) em representar as principais características da precipitação em diferentes regiões do Brasil. Os algoritmos Integrated Multi-satellitE Retrievals for GPM (IMERG) (level-3) e Goddard Profiling Algorithm (GPROF) (level-2) são avaliados em contraste as observações de radares meteorológicos, especificamente, do Sistema Nacional de Proteção da Amazônia (SIPAM) e o radar meteorológico banda X de dupla polarização (X-band CHUVA radar) como referência. As estimativas de precipitação, baseadas em radares de microondas ativos (por exemplo, radares TRMM-PR e GPM-DPR [na banda Ku]) também são utilizadas como referência. Os resultados da campanha CHUVA-Vale sugerem que o GPROF possui uma boa concordância (distribuição espacial e precipitação acumulada), especialmente para casos de chuva convectiva, devido à presença significativa de espalhamento por gelo. No entanto, a intensidade e volume de chuvas leves/moderadas é superestimada e um desempenho (subestimado) relacionado às chuvas fracas/intensas diretamente ligado às ocorrências de chuvas convectivasestratiformes na região do estudo. Para o estudo da região da Amazônia Central (CHUVA-GoAmazon), os resultados mostraram que, durante a estação chuvosa, o IMERG, que utiliza as estimativas de precipitação do GPROF2014 a partir do sensor GPM Microwave Imager (GMI), superestima significativamente a freqüência de chuvas intensas em torno de 00:00-04:00 UTC e 15:00-18:00 UTC. Essa superestimativa é particularmente evidente nos rios Negro, Solimões e Amazonas devido ao algoritmo apresentasse erroneamente calibrado sobre as superfícies de água. Por outro lado, durante a estação seca, o produto IMERG subestima a precipitação média em comparação com o radar banda-s do SIPAM, principalmente devido ao fato de que células convectivas isoladas à tarde não são detectadas por tal algoritmo. O estudo baseado na verificação das estimativas do GPM Level 2 por abordagens tradicional e baseada em objeto mostra que, embora a subestimiativa do volume e ocorrência de chuvas intensas, foi observada uma boa concordância do GPROF2014 (TMI e GMI) versus TRMM PR e GPM DPR (Ku band), Respectivamente. Tais evidentes melhores desempenhos foram encontrados através de análises contínua e categórica, especialmente durante a estação chuvosa, onde o maior número e maiores áreas de objetos foram observados. As maiores áreas, observadas pelo GPROF2014 (GMI) comparada ao DPR (banda Ku) esteve diretamente ligada à estrutura de perfis verticais dos sistemas de precipitantes e a presença de banda brilhante foi a principal fonte de incerteza na estimativa da área e intensidade de precipitação. Os resultados referentes à modelagem do erro, através da ferramenta Precipitation Uncertainties for Satellite Hydrology (PUSH), as análises demonstraram que o modelo PUSH foi adequado para caracterizar o erro do algoritmo IMERG quando aplicado às estimativas de radar banda S do SIPAM. O modelo PUSH pôde prever eficientemente a distribuição de erro em termos espaciais e de intensidade. No entanto, observou-se uma subestimativa (superestimativa) das taxas de chuva fracas do satélite durante o período seco (chuvoso), especialmente ao longo do rio. Embora o erro estimado tenha apresentado menor desvio padrão do que o erro observado, eles apresentaram boas correlações entre si, especialmente na captura do erro sistemático ao longo dos rios Negro, Solimões e Amazonas, especialmente durante a estação chuvosa.
Quaas, Johannes, Olivier Boucher, Nicolas Bellouin et Stefan Kinne. « Which of satellite- or model-based estimates is closer to reality for aerosol indirect forcing ? » Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189545.
Texte intégralQuaas, Johannes, Olivier Boucher, Nicolas Bellouin et Stefan Kinne. « Which of satellite- or model-based estimates is closer to reality for aerosol indirect forcing ? » National Acadamy of Sciences, 2011. https://ul.qucosa.de/id/qucosa%3A13972.
Texte intégralBlinn, Christine Elizabeth. « Increasing the Precision of Forest Area Estimates through Improved Sampling for Nearest Neighbor Satellite Image Classification ». Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28694.
Texte intégralPh. D.
Roy, Tirthankar, Hoshin V. Gupta, Aleix Serrat-Capdevila et Juan B. Valdes. « Using satellite-based evapotranspiration estimates to improve the structure of a simple conceptual rainfall–runoff model ». COPERNICUS GESELLSCHAFT MBH, 2017. http://hdl.handle.net/10150/623239.
Texte intégraldiagnostic structural improvementsto hydrologic models whenever possible.
SHRESTHA, Mandira Singh. « Bias-Adjustment of Satellite-Based Rainfall Estimates over the Central Himalayas of Nepal for Flood Prediction ». 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142254.
Texte intégralClaggett, Seton Paul. « Evaluation of the Utility of Satellite Rainfall Estimates for Water Resource Applications using Sub-Basin Areal Averages and Pixel-to-Pixel Comparisons ». Thesis, The University of Arizona, 2001. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0020_m_sip1_w.pdf&type=application/pdf.
Texte intégralGreatrex, Helen. « The application of seasonal rainfall forecasts and satellite rainfall estimates to seasonal crop yield forcasting for Africa ». Thesis, University of Reading, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578012.
Texte intégralYilmaz, Koray Kamil. « Towards Improved Modeling for Hydrologic Predictions in Poorly Gauged Basins ». Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195252.
Texte intégralPotgieter, Andries B. « Determining broadacre crop area estimates through the use of multi-temporal modis satellite imagery for major Australian winter crops ». University of Southern Queensland, Faculty of Engineering and Surveying, 2009. http://eprints.usq.edu.au/archive/00006613/.
Texte intégralBisht, Gautam. « Satellite-based estimates of net radiation and modeling the role of topography and vegetation on inter-annual hydro-climatology ». Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60706.
Texte intégralThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 229-260).
The Fourth Assessment Report of the Intergovernmental Panel on Climate Change acknowledged that the lack of relevant observations in various regions of the world is a crucial gap in understanding and modeling impacts of climate change related to hydrologic cycle. The Surface Radiation Budget (SRB) is an important component in the study of land surface processes. Existing SRB retrieval algorithms generally suffer from two major shortcomings: difficulty in dealing with cloudy sky conditions and reliance on study-site specific ancillary ground data. In this work, a framework of estimating net radiation from the MODerateresolution Imaging Spectroradiometer (MODIS) data is presented that is applicable under all-sky conditions, while solely relying on satellite data. The results from the proposed methodology are compared against several ground measurements within the United States for the entire 2006. Finally, monthly radiation maps for the Continental United States are produced. Modeling, similar to observations, is critical to the Earth Sciences and the second part of this work focuses on the impact of incorporating vegetation dynamics and topography in modeling hydro-climatology over large river basins. Land and atmosphere are coupled with each other through the exchange of heat, momentum and water at the boundary. This work involves coupling of a physically-based, fully distributed ecohydrology model with a numerical atmospheric model, using high performance computing. The ability of the ecohydrology model (in an offline mode) to accurately resolve hydro-climatic signatures and vegetation dynamics is first examined. The ecohydrology model is applied in a highly instrumented catchment, Walnut Gulch Experimental Watershed (WGEW) in Arizona, for a period of 11-years (1997-2007). The ecohydrology model is able to capture the behavior of several key hydrologic variables and vegetation dynamics within the WGEW. A series of three synthetic experiments are conducted with a coupled land-atmosphere model. The anomalies of various simulated quantities between the synthetic experiments are examined within the rainfall-soil moisture feedback hypothesis proposed by Elathir [1998]. The results from the experiments highlight the need to explicitly account for vegetation dynamics and topography within a numerical atmospheric model. The thesis concludes with a discussion of contributions, and future directions for this work.
by Gautam Bisht.
Ph.D.
Kandasamy, Sivasathivel. « Leaf Area Index (LAI) monitoring at global scale : improved definition, continuity and consistency of LAI estimates from kilometric satellite observations ». Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-00967319.
Texte intégralWillis, Josh K. « Combining satellite and in situ data to make improved estimates of upper-ocean thermal variability on eddy to global scales / ». Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3137208.
Texte intégralPatel, Ekta, Gurtina Besla et Kaisey Mandel. « Orbits of massive satellite galaxies - II. Bayesian estimates of the Milky Way and Andromeda masses using high-precision astrometry and cosmological simulations ». OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/624428.
Texte intégralVishwakarma, Bramha Dutt [Verfasser], et Nico [Akademischer Betreuer] Sneeuw. « Understanding and repairing the signal damage due to filtering of mass change estimates from the GRACE satellite mission / Bramha Dutt Vishwakarma ; Betreuer : Nico Sneeuw ». Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2017. http://d-nb.info/1138234877/34.
Texte intégralYe, Yufang [Verfasser], Justus [Akademischer Betreuer] [Gutachter] Notholt et Thomas [Gutachter] Jung. « Correcting Multiyear Sea Ice Concentration Estimates from Microwave Satellite Observations with Air Temperature, Sea Ice Drift and Dynamic Tie Points / Yufang Ye. Betreuer : Justus Notholt. Gutachter : Justus Notholt ; Thomas Jung ». Bremen : Staats- und Universitätsbibliothek Bremen, 2016. http://d-nb.info/1107458366/34.
Texte intégralCassé, Claire. « Impact du forçage pluviométrique sur les inondations du fleuve Niger à Niamey : Etude à partir de données satellitaires et in-situ ». Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30236/document.
Texte intégralSince the development of satellite based remote sensing in the 1970s, many missions have been dedicated to monitoring the terrestrial atmosphere and surfaces. Some of these satellites are dedicated to the Tropics with specific orbits. Megha-Tropiques (MT) is devoted to the water and energy cycle in the tropical atmosphere and provides an enhanced sampling for rainfall estimation in the tropical region. This PhD work was initiated within MT hydro-meteorological activities, with the objective of assessing the hydrological potential of satellite rainfall products in the Tropics. The world most important rivers lay in tropical areas where the in situ observation networks are deficient. Alternative information is therefore needed for water resource management and alert systems. The present work focuses on the Niger River a basin which has undergone drastic climatic variations leading to disasters such as droughts and floods. Since 1950, the Niger has been through 3 main climatic periods: a wet period (1950-1960), a long and intense drought period (1970-1980) and since 1990 a partial recovery of the rainfall. These climatic variations and the anthropic pressure, have modified the hydrological behaviour of the basin. Since 2000, the middle Niger River has been hit by an increase of floods hazards during the so-called Red flood period. In Niamey city, the highest river levels and the longest flooded period were recorded in 2003, 2010, 2012 and 2013, leading to heavy casualties and property damage. This study combines hydrological modelling and a variety of rainfall estimation products (satellite and in-situ) to meet several objectives: (i) the simulation of the Niamey Red flood and the detection of floods (during the recent period 2000-2013) (ii) the study of the propagation of satellite rainfall errors in hydrological modelling (iii) the evaluation of the role of rainfall variability, and surface conditions, in the changes of the Red flood in Niamey since the 50s. The global model ISBA-TRIP, is run with a resolution of 0.5° and 3h, and several rainfall products were used as forcing. Products derived from gauges (KRIG, CPC), pure satellite products (TAPEER, 3B42RT, CMORPH, PERSIANN) and mixed satellite products adjusted by rain gauges (3B42v7, RFE2, PERSIANN-CDR). This work confirms the hydrological potential of satellite rainfall products and proposes an original approach to overcome their biases. It highlights the need for documenting the errors associated with the rainfall products and the error structure. Finally, the hydrological modelling results since the 1950s have given a new understanding of the relative role of rainfall and surface conditions in the drastic increase of flood risk in Niamey
Ouhechou, Amine. « Analyse de la variabilité multi-échelles du rayonnement solaire incident sur la façade atlantique de l'Afrique Centrale : observations in-situ, estimations satellitaires, et simulations climatiques CMIP6 ». Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALU007.
Texte intégralWestern Central Africa, home to the densest forests of the Congo Basin - the second largest tropical forest massif after Amazonia - is characterized by an equatorial climate with high temperatures, a bimodal rainfall pattern and, a long and cloudy dry season from June to September. Despite its ecological importance, the climate variability of this region has been less studied compared with other parts of the African continent, mainly because of the scarcity of in-situ observations.Recognizing these challenges posed by the lack of in-situ data, this study explores the climate variability in Western Central Africa through the lens of surface solar radiation, a key parameter for the functioning of tropical forests. In this context, this thesis aims to establish an initial climatology of surface solar radiation for the region, to document its variability, particularly during the cloudy dry season from June to September, and to assess the performance of satellite products, reanalyses and CMIP6 climate model simulations.In the first part, an evaluation of eight satellite products for estimating solar radiation (CERES-EBAF, CERES-SYN1deg, TPDC, CMSAF SARAH-2, CMSAF CLARA-A2, CAMS-JADE, WorldClim 2 and ERA5 reanalysis) reveals differences in the spatiotemporal fields. While successfully capturing mean annual solar radiation cycles, the products show regional variations, highlighting the impact of atmospheric parameters on the accurate estimation of solar radiation. In addition, all the products except WorldClim 2 agree that the Atlantic coast receives less solar radiation than the other regions of Central Africa. The performance of these products is also assessed against in-situ measurements based on four types of solar radiation diurnal cycle - Obscure, Obscure AM (morning), Obscure PM (afternoon) and Bright days. The products correctly represent the shape of these four types, but with a larger amplitude.The second part focuses on studying the interannual variability and trends in solar radiation during the June-September cloudy dry season, highlighting notable differences between CMSAF SARAH-2 satellite product and ERA5 reanalysis. The study also made it possible to identify the onset and cessation dates of the dry season based on solar radiation, and establishing a significant relationship between surface temperatures of the equatorial Atlantic ocean and the onset of the dry season.In the final part, the capacity of CMIP6 global climate models to reproduce average levels of solar radiation in the region was assessed. The results highlight sub-regional disparities in model performance. The models used in this study underestimate solar radiation in the south-west of Gabon-Congo, while they overestimate it in the north-east, mainly from april to december. The largest differences were observed during the october-november rainy season. These disparities seem to be caused by cloud cover, in particular low- and medium-level clouds, which have a significant influence on solar radiation, although the relationship varies according to the models. This section also highlights the teleconnection between the surface temperature of the equatorial Atlantic ocean and solar radiation in the models, which varies between the coastal and inland areas of Gabon, underlining the need to use regional climate models
Stubblefield, Cedrick L. « Microwave estimates of the extratropical transitions process ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FStubblefield.pdf.
Texte intégralFrost, Edmond M. « Global scale estimates of aerosol particle characteristics ». Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23245.
Texte intégralNOAA-7 AVHRR data from April 1982 and 1983 were used to perform a global scale analysis of aerosol particle characteristics. Several improvements were incorporated into an AVHRR multichannel satellite data technique developed by Pfeil (1986). This included better cloud and sunglint discrimination, removal of Rayleigh radiance and accounting for ozone absorption. The characteristics analyzed were optical depth and Aerosol Particle Size Index (S₁₂). S₁₂ provides the slope of the aerosol particle size distribution curve. Both of these parameters were evaluated during several naturally occurring events, foremost of which were the 1982 El Chicon eruption and the 1982-1983 El Nino-Southern Oscillation event. The results provided evidence that a significant amount of aerosol particles over marine regions are from land-derived sources. However, the results also provided evidence that some marine aerosol particles may be of biogenic origins,
http://archive.org/details/globalscaleestim00fros
Lieutenant, United States Navy
Saw, Bun Liong. « Infrared and passive microwave satellite rainfall estimate over tropics ». Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4267.
Texte intégralThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (December 19, 2006) Includes bibliographical references.
Ma, Xiaoyan, Fangqun Yu et Johannes Quaas. « Reassessment of satellite-based estimate of aerosol climate forcing ». Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177222.
Texte intégralMa, Xiaoyan, Fangqun Yu et Johannes Quaas. « Reassessment of satellite-based estimate of aerosol climate forcing ». Wiley, 2014. https://ul.qucosa.de/id/qucosa%3A13449.
Texte intégralMILANI, Lisa. « Multi-sensor Satellite Precipitation Estimate for Hydrogeological Hazard Mitigation ». Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2388795.
Texte intégralJoetzjer, E., M. Pillet, P. Ciais, N. Barbier, J. Chave, M. Schlund, F. Maignan et al. « Assimilating satellite-based canopy height within an ecosystem model to estimate aboveground forest biomass ». AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/625358.
Texte intégralQuaas, Johannes, Olivier Boucher, Nicolas Bellouin et Stefan Kinne. « Satellite-based estimate of the direct and indirect aerosol climate forcing ». Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-177289.
Texte intégralQuaas, Johannes, Olivier Boucher, Nicolas Bellouin et Stefan Kinne. « Satellite-based estimate of the direct and indirect aerosol climate forcing ». Wiley, 2008. https://ul.qucosa.de/id/qucosa%3A13453.
Texte intégralRen, Weili. « A control-centralised multiaccess protocol exploiting non-selective fading for LEO satellite communications ». Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/892/.
Texte intégralEvans, Jessica. « Use of satellite imagery to estimate global mortality attributable to fine particulate air pollution ». Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28774.
Texte intégralLang, Andreas. « Adaptive channel estimators suitable for implementation in coherent digital receivers operating in a mobile satellite environment ». Thesis, Edinburgh Napier University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286200.
Texte intégralKuratomi, Alejandro. « GNSS Position Error Estimated by Machine Learning Techniques with Environmental Information Input ». Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262692.
Texte intégralInom Intelligenta transportsystem (ITS), specifikt för självkörande fordon, så är en exakt fordonspositionering en nödvändighet för ökad trafiksäkerhet. Positionsnoggrannheten beror på estimering av både positionen samt positionsfelet. Olika tekniker och tillämpningar som siktar på att förbättra positionsfeluppskattningen behövs, vilket det nu forskas kring. Denna uppsats undersöker olika maskininlärningsalgoritmer inriktade på estimering av positionsfel. Algoritmerna utvärderar relevant information från en GNSS-mottagare, samt information från en kamera om den kringliggande miljön. En GNSS-mottagare och kamera monterades på en radiostyrd mobil testplattform för insamling av data. Examensarbetet består av två delar. Första delen innehåller träning och testning av valda maskininlärningsalgoritmer med GNSS-data tillhandahållen av Waysure från tester gjorda under 2016. Denna data inkluderar ingen information från den omkringliggande miljön runt GNSS-mottagaren. Andra delen består av träning och testning av valda maskininlärningsalgoritmer på GNSS-data som kommer från nya tester gjorda under maj 2019, vilka inkluderar miljöinformation runt GNSS-mottagaren. Resultaten från båda delar analyseras. De viktigaste egenskaper som erhålls från en trädbaserad modell, algoritmens beslutsträd, presenteras. Slutsatsen från denna rapport är att det inte går att statistiskt säkerställa att inkludering av information från den omkringliggande miljön från en kamera förbättrar noggrannheten vid estimering av positionsfelet med de valda maskininlärningsmodellerna.
Vitalich, John. « Design and simulation of a three-axis stabilized satellite and Kalman filter rate estimator ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FVitalich.pdf.
Texte intégralLamichhane, Gaurav Raj. « STATISTICAL ASSESSMENT OF PERFORMANCE OF INTEGRATED MULTI-SATELLITE RETRIEVALS FOR GPM (IMERG) TO ESTIMATE MONTHLY PRECIPITATION ». OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2559.
Texte intégralSpata, Alessandro. « SISTEM : a new method to integrate geodetic and satellite data to estimate 3D ground deformation maps ». Thesis, Universita' degli Studi di Catania, 2011. http://hdl.handle.net/10761/376.
Texte intégralDorij, Passang. « Satellite Remote Sensing Algorithm Development to Estimate Total Suspended Sediment Concentration for Highly Turbid Waters of Western Australia ». Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/55102.
Texte intégralCôté, Jimmy. « Application des estimateurs de type Unscented pour l'estimation des états, des perturbations et des paramètres d'un satellite ». Mémoire, Université de Sherbrooke, 2007. http://savoirs.usherbrooke.ca/handle/11143/1352.
Texte intégralCôté, Jimmy. « Application des estimateurs de type Unscented pour l'estimation des états, des perturbations et des paramètres d'un satellite ». [S.l. : s.n.], 2007.
Trouver le texte intégralWu, Ya-Lin, et Patrick D. Sheehan. « An ALMA Dynamical Mass Estimate of the Proposed Planetary-mass Companion FW Tau C ». IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625808.
Texte intégralKerstetter, David. « Use of Pop-Up Satellite Tag Technology to Estimate Survival of Blue Marlin (Makaira nigricans) Released from Pelagic Longline Gear ». W&M ScholarWorks, 2001. https://scholarworks.wm.edu/etd/1539617772.
Texte intégralWeideman, Craig Ivan. « Linking satellite and point micrometeorological data to estimate : distributed evapotranspiration modelling based on MODIS LAI, Penman-Monteith and functional convergence theory ». Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1012078.
Texte intégralYoon, Yeosang. « Evaluation of the potential to estimate river discharge using measurements from the upcoming SWOT mission ». The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1376480417.
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