Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"SMAP"”.
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An observing system simulation experiment for soil moisture measurements from the SMAP radiometer
The Soil Moisture Active Passive (SMAP) satellite, to be launched in 2013, will use both radiometer and radar data to estimate soil moisture. Improved soil moisture knowledge has many applications in hydroclimatology, numerical weather prediction, flood forecasting, and human health. In this …
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Análise e superação de algumas dificuldades na calibração automática do modelo SMAP-II - versão suavizada
… encountered in the automatic calibration of the SMAP-II model, smoothing version. A possible interdependence between the parameters of the channel phase and the runnoff recession coefficient is investigated from analysis of the response surface, the sensivity ratio calculation and also the …
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Calibração automática de modelos tipo chuva-vazão utilizando técnicas de suavização: uma aplicação ao modelo SMAP-II
Parameter calibration is a critical, but essential step in Hydrologic Modelling. In this way, some optimization algorithms for automatic calibration have been applied to conceptual Rainfall-Runoff modelling, but several problems have been detected, which have motivated many researches. This work …
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Spatio-temporal variability of soil moisture in the Canadian boreal forest and influence of the organic soil layer
… including the Soil Moisture Active Passive (SMAP) mission. The presence of a thick organic soil layer above the mineral layer is a soil characteristic distinctive to this biome. The sensitivity of SM within each of these soil layers to the SMAP SM product is of great interest. To investigate …
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A socio-technical systems analysis of change processes in the design of flagship interplanetary missions
… mission, Soil Moisture Active Passive (SMAP). This analysis has shown that there is some consistency across these projects with regard to which subsystems generate or absorb change. The relationship of the ECRSubsystem networks identifies subsystems that are absorbers of change and …
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Soil moisture-based drought monitoring using remote sensing over Africa
… gathered from the Soil Moisture Active Passive (SMAP) mission with dates ranging from April 2015 to December 2023, in order to develop a drought monitoring system that incorporates seasonality and climatology. Monthly drought thresholds are developed based on percentiles of soil moisture found in …
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Multiple scattering of microwaves from soil surface and vegetation canopies
… The algorithm is implemented over Africa using SMAP 36 km brightness temperature radiometric measurements using both zeroth and first-order radiative transfer models. The first-order radiative transfer model is determined to be more sensitive to surface emission resulting in an improved surface …
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Comparação de dois métodos de otimização em modelos hidrológicos do tipo chuva-vazão
… the conceptual catchment rainfall-runoff, named SMAP modified, and the simple least squares criterion were employed.
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Machine learning and remote sensing in the physical sciences : applications in Earth surface and atmospheric modeling.
… mapped onto NASA Soil Moisture Active Passive (SMAP) SM retrievals from January 1, 2016 – January 1, 2019. The best-performing model predicted SM with a mean error of 0.02 cm3 cm–3 with respect to SMAP SM retrievals. Part 2 analyzed aerosol-cloud interactions (ACIs) using NASA satellite …
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Pātangaroa: Co-developing management strategies for a starfish outbreak in Ōhiwa Harbour
… to co-develop a starfish management action plan (SMAP) with local iwi (tribe) Ngāti Awa and other affiliated iwi, district councils and regional council to address the overabundant starfish (species: Coscinasterias muricata and Patiriella regularis). By engaging in transdisciplinary research and …
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Water and carbon flux responses to soil moisture pulses in the Western United States
… from twelve AmeriFlux tower (in situ) and SMAP (satellite) sites across the region were used to estimate relationships between carbon flux and resource availability. The differences between respiration and photosynthesis dominant regimes and the transition from water to energy limited …
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Projeções de vazões afluentes à usina elevatória Santa Cecília (RJ) a partir de cenários de desmatamento da floresta amazônica e de mudanças climáticas
… The monthly version of hydrologic model SMAP was used. The model was calibrated with precipitation data from National Water Agency (ANA) and natural flow data from Electric System National Operator (ONS). In the forecast phase, climate forecast data from CAM3.1 model (based on …
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Modeling Control Signals for Reconstruction-based Time Series Anomaly Detection
… on the NASA Soil Moisture Active Passive (SMAP) satellite and the Mars Science Laboratory (MSL) Rover, which contains heterogeneous sensing data from exploratory missions. The pipeline follows the Sintel machine learning framework and is accessible through the Meissa library, which builds …
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Method for Recharge and Sustainable Groundwater Use Estimation Using Soil Moisture Time-Series Analysis
… to satellite-based soil moisture data from the SMAP mission and the combined SMAPSMOS product. Despite resolution and noise limitations, these datasets produced reasonable drainage estimates, and the combined product showed particular promise for capturing drydowns at global scale. The findings …
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Review of current radiometer technology with suggestions for future South African satellites
… to launch missions such as Aquarius, SMOS and SMAP. Multi-frequency radiometers are used to classify various other aspects of Earth's surface-atmosphere system. The structure of this dissertation is to introduce the concepts of radiometry with a review of current and future radiometers from …
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Guidance Index for Shallow Landslide Hazard Analysis
… is presented. Root-soil moisture retrieved from SMAP and rainfall retrieved from GPM are used to develop models that calculate the SLI for the continental United States for 10-days, 7-days, and 3-days. The resulting models indicated a strong relationship (93.4%, 93.8%, and 93.7% respectively) …
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Combinaison de données optique et radar pour l’estimation de l’humidité du sol en milieu agricole
… terrain Soil Moisture Active and Passive (SMAP) tenue au Manitoba en 2016 (SMAPVEX16-MB) en vue de supporter les activités de validation des produits du satellite SMAP. Au cours de cette campagne, les caractéristiques du sol (humidité du sol et rugosité) et les données de végétation …
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A Framework for Identifying Roadway Characteristics Affecting Speeding-Related Crashes in Rural Areas
… plan, such as a Speed Management Action Plan (SMAP), and collaboration with all parties involved. The goal of this research is to provide a framework to help rural areas identify locations that are at higher risk of speeding-related crashes by analyzing roadway characteristics that have a …
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Online Anomaly Detection for Time Series. Towards Incorporating Feature Extraction, Model Uncertainty and Concept Drift Adaptation for Improving Anomaly Detection
… dataset. In the second part of the experiment, sMAP dataset is used with 4-dimensional features to demonstrate the method on multivariate time-series data. Experimental result shows DQR-AD have 10% better performance than AE on three datasets (SMAP1, SMAP3, and SMAP5) and equal performance on …
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Online Anomaly Detection for Time Series. Towards Incorporating Feature Extraction, Model Uncertainty and Concept Drift Adaptation for Improving Anomaly Detection
… dataset. In the second part of the experiment, sMAP dataset is used with 4-dimensional features to demonstrate the method on multivariate time-series data. Experimental result shows DQR-AD have 10% better performance than AE on three datasets (SMAP1, SMAP3, and SMAP5) and equal performance on …