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GNSS REFLECTOMETRY MEASUREMENT OF SNOW DEPTH AND SOIL MOISTURE IN THE FRENCH ALPS
(Ieee, 2015-01-01)
Over the last ten years Earth observing systems have grown considerably and thus allow the use of Global Navigation Satellite System (GNSS) signals for remote sensing. Several studies in the U.S. have proven the ability ...
GNSS reflectometry measurement of snow depth and soil moisture in the French Alps
(2015-11-10)
Over the last ten years Earth observing systems have grown considerably and thus allow the use of Global Navigation Satellite System (GNSS) signals for remote sensing. Several studies in the U.S. have proven the ability ...
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 ...
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. ...
Integration of satellite signal acquisition algorithm to the GNSS-SDR framework
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia de ComputaçãoEngenharia de Computação e Automação, 2022-07-27)
The Variance-Triggered Two-Step Acquisition (VTTS) is an algorithm that composes one
step of the position calculation of a Global Navigation Satellite System (GNSS) receiver.
The main function is to detect visible ...
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 ...
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 ...
Inventions Utilizing Satellite Navigation Systems in the Railway Industry: An Analysis of Patenting Activity
(Universidad Alberto Hurtado. Facultad de Economía y Negocios, 2009)
Inventions Utilizing Satellite Navigation Systems in the Railway Industry – An Analysis of Patenting Activity
(Universidad Alberto Hurtado. Facultad de Economía y Negocios, 2014)