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Precisão de coordenadas planimétricas obtidas com receptores GNSS de pontos situados sob redes elétricas de alta tensão
(Universidade Federal de Santa MariaBRGeociênciasUFSMPrograma de Pós-Graduação em Geomática, 2012-09-17)
The purpose of this work was investigate and measure the possibility to exist
multipath caused by the corona noise generated in high voltage electric lines
recepting GNSS signals. Experiments were realized with a 69 kV ...
High-Rate Altimetry in SNR-Based GNSS-R: Proof-of-Concept of a Synthetic Vertical Array
(2021-01-01)
Global Navigation Satellite System Reflectometry (GNSS-R) has emerged as a promising remote sensing technique for coastal sea level monitoring. GNSS-R based on signal-to-noise ratio (SNR) observations employs a single ...
Exploring the correlation between ionospheric scintillation and GNSS positioning error near the magnetic equator using machine learning techniques
(Instituto Geofísico del Perú, 2020-06)
Ionospheric scintillations are a common phenomenon in the equatorial ionosphere. This phenomenon directly affects the position estimated by GNSS receivers degrading the quality of the radio signals; however, the quantification ...
Avaliação da precisão dos equipamentos GNSS, verificando a discrepância das coordenadas, utilizando a carta controleEvaluation of accuracy of GNSS equipment, checking the variance the coordinates, utilizing the control chart
(Universidade Tecnológica Federal do Paraná (UTFPR), 2021)
Avaliação do uso da tecnologia GNSS/RTK e GNSS/RTX para medições rápidas de coordenadas e área em local de inundação
(Universidade do Vale do Rio dos Sinos, 2017)
To assess the impacts caused by floods, we can use altimetry and the calculation of the flood area as tools for prevention and mitigation of new cases. With the advancement of GNSS (Global Navigation Satellite System) ...
Avaliação do uso da tecnologia GNSS/RTK e GNSS/RTX para medições rápidas de coordenadas e área em local de inundação
(Universidade do Vale do Rio dos Sinos, 2017)
To assess the impacts caused by floods, we can use altimetry and the calculation of the flood area as tools for prevention and mitigation of new cases. With the advancement of GNSS (Global Navigation Satellite System) ...
Vulnerabilidade dos sistemas GNSS a ataques do tipo Spoofing
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2019-12-10)
The vulnerability of the GNSS constellation extends beyond blocking and signal loss to fake attacks, where communication signal spoofs are generated to manipulate the position, speed, and information a receiver receives. ...
Introdução e aplicação da diluição da precisão das ambiguidades GNSS - ADOP
(2014-01-01)
The main topic of this paper is the Ambiguity Dilution of Precision known as ADOP. Basically, ADOP is defined as a diagnostic measure for assessing the precision of the float scalar ambiguities. Among the several possibilities, ...
50 years of synergy between space geodesy and meteorology: From a GNSS positioning error to precipitation nowcasting applications50 anos de sinergia entre geodésia espacial e meteorologia: Do erro no posicionamento GNSS a aplicações de previsão de precipitação de curtíssimo prazo
(2020-12-01)
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 ...