Luiz Fernando Sapucci
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View article: Modulation of tropical stratospheric gravity wave activity and the ITCZ position by modes of climate variability using radio occultation and reanalysis data
Modulation of tropical stratospheric gravity wave activity and the ITCZ position by modes of climate variability using radio occultation and reanalysis data Open
The Intertropical Convergence Zone (ITCZ) is a dominant feature of tropical climate characterized by intense convection that influences global atmospheric circulation and serves as a primary source of stratospheric gravity waves (GWs), whi…
View article: Influence of modes of climate variability on stratospheric gravity waves in the tropics using Radio Occultation and Reanalysis Data
Influence of modes of climate variability on stratospheric gravity waves in the tropics using Radio Occultation and Reanalysis Data Open
The Intertropical Convergence Zone (ITCZ) is a critical driver of tropical climate, characterized by convective activity that transfers energy, influences atmospheric circulation, and modulates precipitation. These processes generate atmos…
View article: The relationship between ITCZ and the Equatorial Stratospheric Gravity Waves inferred from Radio Occultation Measurements
The relationship between ITCZ and the Equatorial Stratospheric Gravity Waves inferred from Radio Occultation Measurements Open
The GNSS radio occultation (RO) temperature and refractivity data obtained from COSMIC-1, COSMIC-2, and METOP satellites for 2011-2021 was used to investigate the occurrence of equatorial stratospheric gravity waves (ESGWs) and their relat…
View article: The Sensitivityof GPS Precipitable Water Vapor Jumps to Intense Precipitation Associated with Tropical Organized Convective Systems
The Sensitivityof GPS Precipitable Water Vapor Jumps to Intense Precipitation Associated with Tropical Organized Convective Systems Open
The Global Positioning System (GPS) consists of a constellation of satellites that transmit radio frequency signals to many users with varied applications. For meteorological purposes, the based-ground GPS receivers can provide high-qualit…
View article: The Relationship between Itcz and the Equatorial Stratospheric Gravity Waves Inferred from Radio Occultation Measurements
The Relationship between Itcz and the Equatorial Stratospheric Gravity Waves Inferred from Radio Occultation Measurements Open
View article: Assessment of the data assimilation framework for the Rapid Refresh Forecast System v0.1 and impacts on forecasts of a convective storm case study
Assessment of the data assimilation framework for the Rapid Refresh Forecast System v0.1 and impacts on forecasts of a convective storm case study Open
The Rapid Refresh Forecast System (RRFS) is currently under development and aims to replace the National Centers for Environmental Prediction (NCEP) operational suite of regional- and convective-scale modeling systems in the next upgrade. …
View article: Assimilação de Dados de Radiância do Sensor AMSU-A no GSI: Visão Geral sobre sua Importância para a Qualidade das Condições Iniciais na PNT do CPTEC. Assimilação de Dados de Radiância do Sensor AMSU-A no GSI/BAM/CPTEC: Descrição e Importância para a PNT
Assimilação de Dados de Radiância do Sensor AMSU-A no GSI: Visão Geral sobre sua Importância para a Qualidade das Condições Iniciais na PNT do CPTEC. Assimilação de Dados de Radiância do Sensor AMSU-A no GSI/BAM/CPTEC: Descrição e Importância para a PNT Open
Resumo O Gridpoint Statistical Interpolation (GSI) é o sistema de assimilação de dados utilizado no Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) do Instituto Nacional de Pesquisas Espaciais (INPE) desde 2013 e atualmente integr…
View article: Comment on gmd-2021-289
Comment on gmd-2021-289 Open
Abstract. The Rapid Refresh Forecast System (RRFS) is currently under development and aims to replace the National Centers for Environmental Prediction (NCEP) operational suite of regional- and convective-scale modeling sy…
View article: Comment on gmd-2021-289
Comment on gmd-2021-289 Open
Abstract. The Rapid Refresh Forecast System (RRFS) is currently under development and aims to replace the National Centers for Environmental Prediction (NCEP) operational suite of regional and convective scale modeling sys…
View article: Assessment of the data assimilation framework for the Rapid Refresh Forecast System v0.1 and impacts on forecasts of convective storms
Assessment of the data assimilation framework for the Rapid Refresh Forecast System v0.1 and impacts on forecasts of convective storms Open
The Rapid Refresh Forecast System (RRFS) is currently under development and aims to replace the National Centers for Environmental Prediction (NCEP) operational suite of regional and convective scale modeling systems in the next upgrade. I…
View article: Assessment of the data assimilation framework for the prototype Rapid Refresh Forecast System and impacts on forecasts of convective storms
Assessment of the data assimilation framework for the prototype Rapid Refresh Forecast System and impacts on forecasts of convective storms Open
The compressed file contains the data and scripts necessary for the numerical experiments conducted in this research and the processing and visualization of the results. It includes the namelist files used for the model when using cold and…
View article: Assessment of the data assimilation framework for the prototype Rapid Refresh Forecast System and impacts on forecasts of convective storms
Assessment of the data assimilation framework for the prototype Rapid Refresh Forecast System and impacts on forecasts of convective storms Open
The compressed file contains the data and scripts necessary for the numerical experiments conducted in this research and the processing and visualization of the results. It includes the namelist files used for the model when using cold and…
View article: Estimativa da Umidade do Solo por Refletometria GNSS: uma Revisão Conceitual
Estimativa da Umidade do Solo por Refletometria GNSS: uma Revisão Conceitual Open
Soil moisture monitoring enables efficient management and use of water resources, having great importance for several purposes, such as: monitoring of risk areas; delimitation of areas susceptible to flooding; geotechnical activities; and …
View article: Exploring the particularities of the method object-based in the precipitation forecast evaluation
Exploring the particularities of the method object-based in the precipitation forecast evaluation Open
Numerical Weather Prediction Models (NWPM) are based on computational methods applied to predict meteorological phenomena from the numerical integration of equations that describe the movement of the atmospheric components. Among the varia…
View article: 50 anos de sinergia entre Geodésia Espacial e Meteorologia: do erro no posicionamento GNSS a aplicações de previsão de precipitação de curtíssimo prazo
50 anos de sinergia entre Geodésia Espacial e Meteorologia: do erro no posicionamento GNSS a aplicações de previsão de precipitação de curtíssimo prazo Open
The neutral atmosphere (or troposphere) causes refraction in radio frequency signals, which results in errors in Global Navigation Satellite Systems (GNSS) measurements. In meteorology, this effect can represent important measurements of t…
View article: Explorando as Particularidades do Método Orientado a Objetos na Avaliação das Previsões de Precipitação
Explorando as Particularidades do Método Orientado a Objetos na Avaliação das Previsões de Precipitação Open
Resumo Os modelos de previsão de tempo baseiam-se em métodos computacionais aplicados para prever os fenômenos meteorológicos a partir da integração numérica de equações que descrevem o movimento dos elementos químicos que compõem a atmosf…
View article: ASSESSMENT OF NEUTRAL ATMOSPHERIC DELAY PREDICTIONS BASED ON THE TEMPORAL RESOLUTION OF AN ATMOSPHERIC MODEL
ASSESSMENT OF NEUTRAL ATMOSPHERIC DELAY PREDICTIONS BASED ON THE TEMPORAL RESOLUTION OF AN ATMOSPHERIC MODEL Open
In Global Navigation Satellite Systems (GNSS), the effects of neutral atmosphere in electromagnetic signal propagation impacts directly on the quality of the final estimated position, leading to errors in the metric order. Using an atmosph…
View article: ASSESSMENT OF NEUTRAL ATMOSPHERIC DELAY PREDICTIONS BASED ON THE TEMPORAL RESOLUTION OF AN ATMOSPHERIC MODEL
ASSESSMENT OF NEUTRAL ATMOSPHERIC DELAY PREDICTIONS BASED ON THE TEMPORAL RESOLUTION OF AN ATMOSPHERIC MODEL Open
Made available in DSpace on 2020-12-12T02:06:37Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020-01-01. Added 1 bitstream(s) on 2021-07-15T15:25:52Z : No. of bitstreams: 1\nS1982-21702020000100200.pdf: 2800894 bytes, checksum: e5fd…
View article: Assimilation of GPSRO Bending Angle Profiles into the Brazilian Global Atmospheric Model
Assimilation of GPSRO Bending Angle Profiles into the Brazilian Global Atmospheric Model Open
The Global Positioning System (GPS) Radio Occultation (RO) technique allows valuable information to be obtained about the state of the atmosphere through vertical profiles obtained at various processing levels. From the point of view of da…
View article: Background Error Covariance Matrix Applied to the Global Data Assimilation System at CPTEC: Single Observation Experiments
Background Error Covariance Matrix Applied to the Global Data Assimilation System at CPTEC: Single Observation Experiments Open
The background error covariance matrix represents a key component of a data assimilation system. It can be shown mathematically that the analysis increments are directly proportional to the covariance matrix. As a result it is correct to s…
View article: Global <scp>P</scp>ositioning <scp>S</scp>ystem precipitable water vapour (<scp>GPS‐PWV</scp>) jumps before intense rain events: <scp>A</scp> potential application to nowcasting
Global <span>P</span>ositioning <span>S</span>ystem precipitable water vapour (<span>GPS‐PWV</span>) jumps before intense rain events: <span>A</span> potential application to nowcasting Open
A rapid increase in atmospheric water vapour is a fundamental ingredient for many intense rainfall events. High‐frequency precipitable water vapour (PWV) estimates (1 min) from a Global Positioning System (GPS) meteorological site are eval…
View article: Sensitivity of Numerical Weather Prediction to the Choice of Variable for Atmospheric Moisture Analysis into the Brazilian Global Model Data Assimilation System
Sensitivity of Numerical Weather Prediction to the Choice of Variable for Atmospheric Moisture Analysis into the Brazilian Global Model Data Assimilation System Open
Due to the high spatial and temporal variability of atmospheric water vapor associated with the deficient methodologies used in its quantification and the imperfect physics parameterizations incorporated in the models, there are significan…
View article: Impacto da Assimilação de Perfis de Refratividade do Satélite Metop-B nas Previsões de Tempo do CPTEC/INPE Durante os Meses de Janeiro e Agosto de 2014
Impacto da Assimilação de Perfis de Refratividade do Satélite Metop-B nas Previsões de Tempo do CPTEC/INPE Durante os Meses de Janeiro e Agosto de 2014 Open
Resumo Atualmente tem crescido o número de satélites de órbita baixa dedicados à rádio ocultação dos sinais do Sistema de Posicionamento Global (GPS). O MetOp-B é um desses novos satélites, mas ainda não foi explorado na assimilação de dad…
View article: Impact of the Assimilation of Metop-B Satellite Refractivity Profiles in the Forecasts of the CPTEC/INPE During the Months of January and August 2014
Impact of the Assimilation of Metop-B Satellite Refractivity Profiles in the Forecasts of the CPTEC/INPE During the Months of January and August 2014 Open
Currently, there is an increase in the number of low orbit satellites dedicated to radio occultation of GPS signals. The MetOp-B is one of these new satellites, but it has not been explored in the data assimilation performed in Brazil. In …
View article: AVALIAÇÃO DA ACURÁCIA E TEMPO DE CONVERGÊNCIADO PPP COM O USO DE PREVISÃO NUMÉRICA DE TEMPO NA MODELAGEM DO ATRASO TROPOSFÉRICO
AVALIAÇÃO DA ACURÁCIA E TEMPO DE CONVERGÊNCIADO PPP COM O USO DE PREVISÃO NUMÉRICA DE TEMPO NA MODELAGEM DO ATRASO TROPOSFÉRICO Open
O GNSS (Global Navigation Satellite Systems) proporciona a posição do usuário na superfície terrestre a partir das coordenadas dos satélites. Porém essas coordenadas são influenciadas por diferentes efeitos que causam erros na posição ſt
View article: INFLUÊNCIA DA ESTIMATIVA DO GRADIENTE HORIZONTAL TROPOSFÉRICO NA QUALIDADE DO POSICIONAMENTO GNSS DE ALTA ACURÁCIA
INFLUÊNCIA DA ESTIMATIVA DO GRADIENTE HORIZONTAL TROPOSFÉRICO NA QUALIDADE DO POSICIONAMENTO GNSS DE ALTA ACURÁCIA Open
Para ï¬ns de posicionamento pelo GNSS (Global Navigation Satellite Systems), a atmosfera pode ser dividida em duas camadas principais; a troposfera e a ionosfera. Tais camadas provocam diversos efeitos e interagem de formas distintas com …
View article: Matriz de Covariâncias dos Erros de Previsão Aplicada ao Sistema de Assimilação de Dados Global do CPTEC: Experimentos com Observação Única
Matriz de Covariâncias dos Erros de Previsão Aplicada ao Sistema de Assimilação de Dados Global do CPTEC: Experimentos com Observação Única Open
Resumo A matriz de covariâncias dos erros de previsão representa uma importante componente de um sistema de assimilação de dados. Pode-se mostrar matematicamente que os incrementos de análise são diretamente proporcionais à matriz de covar…
View article: Response latter for Referee 2
Response latter for Referee 2 Open
The manuscript presents the behavior of GPS-PWV time series during severe precipitation events recorded by an X-band Radar during the CHUVA Vale measurement campaign in 2011.GPS-PWV jumps have been detected between 32 and 64 minutes before…
View article: Response latter for Referee 3
Response latter for Referee 3 Open
This manuscript presents an analysis of time series of PWV from a GPS station and of precipitation from a nearby X-band radar for a period of 56 days in Brazil.The characteristics of PWV variations before and after the peak in precipitatio…
View article: Response latter for Referee1
Response latter for Referee1 Open
The manuscript presents a combined analysis of time series of precipitable water (PW) derived from GPS (Global Positioning System) observations and surface precipitation estimated from an X-band Radar.Both datasets were obtained in 2011 du…