Buscar
Mostrando ítems 1-10 de 590
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 ...
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 ...
A QUALITY MANAGEMENT SYSTEM FOR POSITIONING WITH GNSS TECHNOLOGY
(Maney Publishing, 2010-09-01)
This paper presents a proposal for a Quality Management System for a generic GNSS Surveying Company as an alternative for management and service quality improvements. As a result of the increased demand for GNSS measurements, ...
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 ...
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) ...
Online GNSS processing as alternatives to different geodetic applicationsProcesamientos GNSS en línea como potenciales alternativas a diferentes aplicaciones geodésicas
(Universidad Nacional de Costa Rica, 2015)
Accuracy assessment of Precise Point Positioning with multi-constellation GNSS data under ionospheric scintillation effects
(2018-01-01)
GPS and GLONASS are currently the Global Navigation Satellite Systems (GNSS) with full operational capacity. The integration of GPS, GLONASS and future GNSS constellations can provide better accuracy and more reliability ...
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. ...