Претраживање
Приказ резултата 41-50 од 77
Comparison of IRI-2016 and NEQUICK models of the ionosphere over the Balkan Peninsula during the year 2019 / Поређење IRI-2016 и NEQUICK модела јонофере изнад Балканског полуострва током 2019. године
(University of Banja Luka, Faculty of Architecture, Civil Engineering and Geodesy, 2022)
In this paper, a comparative study of the total vertical electron content (VTEC) calculated using the IRI-2016 and NeQuick2 models were performed. The research was done for the days of maximum solar activity in 2019, with ...
Calculating the differences of VTEC values obtained by altimetric and GNSS observations in coastal areas
(SurveyTaylor & Frencis, 2022)
The difference between the VTEC values obtained from the Global Navigation Satellite System
(GNSS) and satellite altimetry is much more noticeable over the ocean and the sea due to less
coverage of the GNSS observations. ...
Refinement of Individual Tree Detection Results Obtained from Airborne Laser Scanning Data for a Mixed Natural Forest
(MDPI, 2022)
Numerous semi- and fully-automatic algorithms have been developed for individual tree detection from airborne laser-scanning data, but different rates of falsely detected treetops also accompany their results. In this ...
Modeling of vertical gravity gradient by normal gravity field and digital terrain models
(Journal of Geodesy, Springer, 2022)
Vertical gravity gradient, as a change of gravity with the change in height, is a significant physical quantity used in many geodetic and geophysical modeling applications. In this research, we used a normal gravity field ...
GNSS signals as a tool for detection of the influence of solar radiation of terrestrial ionosphere
(IV Meeting on Astrophysical Spectroscopy - A&M DATA - Atmosphere, BOOK OF ABSTRACTS AND CONTRIBUTED PAPERS, 2022)
Solar radiation has the most significant influence on photo-ionization in the
Earth's ionosphere, and different parts of its spectrum in the UV and X domains
have a dominant role in producing free electrons at different ...
Influence of the periodic changes in the incoming solar hydrogen Ly-α radiation intensity on the total electron content in the ionospheric D-region
(2022)
This paper analyzes variations in the total electron content in the D-region induced by periodical changes in the solar hydrogen Lyα radiation. The considered changes are a consequence of variations in the solar radiation ...
The impact of the Atmospheric Parameters at Electrooptical Distance Measurements
(International Federation of Surveyors, FIG, 2022)
The electro-optical distance measurement (EDM) instruments are widely used not only in geodesy but also in almost all engineering disciplines and related projects. High accuracy length measurements are required especially ...
Field procedure for estimation of antenna phase center variation with expanded measurement uncertainty calculation
(University of Montenegro, Faculty of Civil Engineering, 2022)
Antenna phase center of GNSS receiver is the point where the signals transmitted from satellites are collected. However, this point is not necessarily the physical center of antenna (geometric center of antenna). In general, ...
Nove karte gravimetričnih anomalij na območju Republike Slovenije
(Slovensko združenje za geodezijo in geofiziko, 2022)
Obstoječa karta Bouguerovih anomalij, ki pokriva ozemlje Republike Slovenije, je stara nekajdesetletij. Od takrat je na voljo kar nekaj novih podatkov o merjenem težnostnem pospešku naobmočju Slovenije, ter kakovostnih ...
Одређивање мерне несигурности резултата мерења просторног растојања применом глобалних навигационих сателитских система / Determination of spatial distance measurement uncertainty using global navigation satellite systems
(Друштво метролога, 2022)
Постоје четири у потпуности успостављена Глобална навигациона сателитска система (ГНСС): амерички GPS NAVSTAR, руски GLONASS, кинески BEIDOU (COMPASS) и европски GALILEO. Њиховом применом успешно се успостављају терестрички ...