Query : global navigation satellite system
- s zhang5
- ana belen anquela julian4
- angel esteban martin furones4
- f frappart4
- k boniface4
- o bock4
- r ramalho4
- z zhang4
- a k steiner3
- bramanto brian3
- e lasota3
- francisco rovira mas3
- g kirchengast3
- gumilar irwan3
- j januszewski3
- l luo3
- m zhang3
- maria ligia chuerubim3
- p bosser3
- Environmental studies84
- Communication Sciences67
- Architecture and Space Management17
- Political Science7
- Archaeology and Prehistory3
- Methods and Statistics2
- Social Anthropology and Ethnology1
- Art and Art History1
- Classical Studies1
- Economies and Finances1
- Gender Studies1
UAV Photogrammetry and Remote Sensing
The concept of remote sensing as a way of capturing information from an object without making contact with it has, until recently, been exclusively focused on the use of Earth observation satellites.The emergence of unmanned aerial vehicles (UAV) with Global Navigation Satellite System (GNSS) contro...
Kinematic Precise Point Positioning Using Multi-Constellation Global Navigation Satellite System (GNSS) Observations
Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available. This paper discusses the performance of multi-c...
An Improved WiFi/PDR Integrated System Using an Adaptive and Robust Filter for Indoor Localization
Location-based services (LBS) are services offered through a mobile device that take into account a device’s geographical location. To provide position information for these services, location is a key process. GNSS (Global Navigation Satellite System) can provide sub-meter accuracy in open-sky area...
A Filtering-Based Approach for Improving Crowdsourced GNSS Traces in a Data Update Context
Traces collected by citizens using GNSS (Global Navigation Satellite System) devices during sports activities such as running, hiking or biking are now widely available through different sport-oriented collaborative websites. The traces are collected by citizens for their own purposes and frequently...
Effect of surface temperature on soil moisture retrieval using CYGNSS
In this paper, a soil moisture (SM) retrieval model from spaceborne Global Navigation Satellite System Reflectometry (GNSS-R) observations that incorporates soil surface temperature (SST) for the first time is evaluated. Here, based on the grid scale, Cyclone GNSS (CYGNSS) reflectivity, SST and vege...
Look at these search results from a different perspective
Application of a high-resolution weather model in the area of the western Gulf of Corinth for the tropospheric correction of interferometric synthetic aperture radar (InSAR) observations
Space geodesy techniques (SAR interferometry and GNSS) have recently emerged as an important tool for mapping regional surface deformations due to tectonic movements. A limiting factor to this technique is the effect of the troposphere, as horizontal and vertical surface velocities are of the order...
A new snow depth data set over northern China derived using GNSS interferometric reflectometry from a continuously operating network (GSnow-CHINA v1.0, 2013–2022)
The currently available long-term snow depth data sets are either from point-scale ground measurements or from gridded satellite/modeled/reanalysis data with coarse spatial resolution, which limits the applications in climate models, hydrological models, and regional snow disaster monitoring. Benefi...
Chinese ionospheric investigations in 2016–2017
After the release of the previous report to the Committee on Space Research (COSPAR) on progress achieved by Chinese scientists in ionospheric researches (Liu LB and Wan WX, 2016), in the recent two years (2016–2017) many interesting new investigations into various ionospheric related issues have be...
Resolving co- and early post-seismic slip variations of the 2021 MW 7.4 Madoi earthquake in east Bayan Har block with a block-wide distributed deformation mode from satellite synthetic aperture radar data
On 21 May 2021 (UTC), an MW 7.4 earthquake jolted the east Bayan Har block in the Tibetan Plateau. The earthquake received widespread attention as it is the largest event in the Tibetan Plateau and its surroundings since the 2008 Wenchuan earthquake, and especially in proximity to the seismic gaps o...
A new digital elevation model (DEM) dataset of the entire Antarctic continent derived from ICESat-2
Antarctic digital elevation models (DEMs) are essential for fieldwork, ice motion tracking and the numerical modelling of the ice sheet. In the past 30 years, several Antarctic DEMs derived from satellite data have been published. However, these DEMs either have coarse spatial resolution or aggregat...
Utilização DO SOFTWARE MAPGEO 2010 COMO recurso DIDÁTICO NO Estudo DAS superfícies E REFERENCIAIS GEODÉSICOS ADOTADOS EM GEODÉSIA
Este artigo visa realizar uma breve abordagem dos principais conceitos, aplicações e técnicas de posicionamento espacial GNSS (Global Navigation Satellite System) como, por exemplo, o GPS (Global Positioning System), envolvidas na obtenção da ondulação geoidal e na conversão entre as altitudes geomé...
Dynamic Deformation Monitoring of Offshore Oil Platforms with Integrated GNSS and Accelerometer
Dynamic deformation monitoring is a crucial component of the structural health monitoring of an offshore oil platform. Given the insensitivity of the Global Navigation Satellite System (GNSS) to high-frequency vibration information, a combination of GNSS and accelerometer is used for vibration monit...
Wind waves in the North Atlantic from ship navigational radar: SeaVision development and its validation with the Spotter wave buoy and WaveWatch III
Wind waves play an important role in the climate system, modulating the energy exchange between the ocean and the atmosphere and effecting ocean mixing. However, existing ship-based observational networks of wind waves are still sparse, limiting therefore the possibilities of validating satellite mi...
Managing work-related accidents in the city of Zeferino Vaz — Unicamp, using free geotechnologies and software
Administradores públicos e privados necessitam de informações que os auxiliem no gerenciamento e tomada de decisões quanto à prevenção de acidentes de trabalho, que se constituem em graves problemas que atingem de modo geral os trabalhadores. O uso de Sistemas de Informações Geográficas – SIG por me...
Construction of the vertical reference water surface area for the bays of Buenaventura and Malaga, Colombian Pacific
El presente artículo define la ruta metodológica usada en el proyecto “Red Hidrográfica de Referencia Vertical para los principales puertos marítimos Colombianos”, durante la generación del marco vertical de referencia denominado “Superficie Hidrográfica de Referencia Vertical (SHRV2016)” para las b...
Monitoring global climate change using GNSS radio concealment
Abstract The emerging signal of climate change is now clearly evident in Global Navigation Satellite System (GNSS) radio occultation (RO) data, matching predictions made by climate models 15 years ago. The observed RO trends represent well-understood responses to global warming, in particular the wi...
In international standards, the Facilities and Measures of a Class 2 National Downing Control Network
Jeodezinin en önemli görevlerinden biri fiziksel yeryüzü üzerindeki doğal ve yapay detayların üç boyutlu konumsal bilgilerini üretmektir. Yeryüzü üzerindeki konum bilgileri daha önce tesis edilmiş olan yatay ve düşey kontrol noktaları ve Global Navigation Satellite System (GNSS) Ağları ile elde edil...
Comparative STUDY OF METHODS FOR Calculating IONOSPHERIC POINTS AND describing THE GNSS SIGNAL PATH
Abstract: Many efforts have been done in the last decades to improve the formulation of ionospheric models based on data derived from the Global Navigation Satellite System (GNSS). Despite significant improvements in estimating the electron content of the GNSS signal path, little attention has been...
Avaliação DA ACURÁCIA DO cálculo DE Volume DE PILHAS DE REJEITO UTILIZANDO vant, GNSS E LiDAR
Dentre as diversas tecnologias utilizadas para cálculo do volume de materiais na mineração, o Veículo Aéreo Não Tripulado (VANT) e o Light Detecting And Ranging (LiDAR), surgem como alternativas rápidas e precisas, em comparação com as técnicas de topografia tradicionais como estação total e Global...
Mathematical ANALYSIS OF THE algorithms USED IN modernised METHODS OF BUILDING Measurements WITH RTN GNSS TECHNOLOGY
The use of RTN GNSS surveying technology (Real Time Kinematic Global Navigation Satellite System) for direct measurements of building structures is extremely difficult, and often impossible. Therefore, the real-time technology is supported by indirect methods of measurements. One such solution is th...
Application of geographical information technologies for the analysis of surface drainage in an urban sub-basin of the city of White Bay, Argentina
Parte del ejido urbano de Bahía Blanca se extiende sobre la llanura aluvial del arroyo Napostá Grande, curso de agua que nace en el sistema serrano de Ventania, suroeste de la provincia de Buenos Aires. En este tramo inferior las intervenciones urbanísticas y las obras viales contribuyeron con la fo...
Influence of the combination of GPS and GLONASS data on geo-referencing of rural properties
A questão agrária ainda é um tema bastante discutido no Brasil, principalmente no que diz respeito à posse da terra. A Lei nº 10.267/01 foi um grande avanço para a questão agrária. A partir de então, todos os imóveis rurais devem ser georreferenciados ao Sistema Geodésico Brasileiro (SGB). Para isso...
UAV imagery and in-situ measurements for structure-from-motion snow depth mapping over the Laurichard rock glacier, France - surveyed in 2017
Unmanned aerial veichle (UAV) imagery and in-situ field measurements at the Combe de Laurichard, France (45.01ºN, 6.37ºE, 2500 m a.s.l.) were collected to explore uncertainties in mapping snow depth with structure-from-motion and multi-view stereo 3D reconstruction in an alpine area. Repeat UAV surv...
Temporal Shoreline SERIES ANALYSIS using GNSS
In recent decades, Boa Viagem beach located in the city of Recife-PE and Piedade in Jaboatão dos Guararapes-PE (Brazil) has seen urbanization near the coastline causing changes in social, economic and morphological aspects, where coastal erosion problems are observed. This study uses GNSS (global na...
Estimation and analysis of ionosphere irregularities indices using GPS data from active networks
As observáveis GNSS (Global Navigation Satellite System) são afetadas por erros sistemáticos devido aos elétrons livres presentes na ionosfera. O erro associado à ionosfera depende do Conteúdo Total de Elétrons (TEC - Total Electron Content), que é influenciado por diversas variáveis: ciclo solar, é...