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Analiza vpliva različnih modelov troposferske refrakcije na kakovost položaja v GNSS
Ritlop, Klemen (Author), Stopar, Bojan (Mentor) More about this mentor... This link opens in a new window, Sterle, Oskar (Co-mentor)

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Abstract
Vpliv troposferske refrakcije na opazovanja GNSS je eden izmed glavnih vplivov, ki znižujejo kakovost položaja, določenega z GNSS. Čim kakovostnejše modeliranje troposferske refrakcije je zato ključno za določitev položaja z visoko točnostjo in natančnostjo. Sodobne komercialne programske rešitve za obdelavo opazovanj GNSS imajo praviloma implementiranih več modelov troposferske refrakcije, kar uporabnika postavi pred vprašanje, kateri model izbrati za pridobitev položaja čim višje kakovosti. V okviru magistrskega dela analiziramo vpliv šestih, v program Leica Infinity implementiranih modelov troposferske refrakcije, na kakovost relativno določenega položaja z GNSS. Osnovo za analize predstavljajo nizi baznih vektorjev, ki se med seboj razlikujejo v času trajanja opazovanj in/ali ob kakšnih razmerah v troposferi so bila opazovanja pridobljena, bazni vektorji v posameznem nizu opazovanj pa se razlikujejo po dolžini in višinski razliki med krajiščema baznega vektorja. Vpliv modela troposferske refrakcije ter vpliv višinske razlike med krajiščema baznega vektorja in njegove dolžine na kakovost položaja analiziramo ločeno za višinsko in horizontalno komponento položaja. Vse z namenom dobiti odgovor, kateri izmed obravnavanih modelov troposferske refrakcije zagotavlja najvišjo kakovost položaja.

Language:Slovenian
Keywords:troposferska refrakcija, GNSS, kakovost položaja, točnost položaja
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2017
Publisher:[K. Ritlop]
UDC:528.235:551.510.52(043.3)
COBISS.SI-ID:8115297 Link is opened in a new window
Views:843
Downloads:439
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Secondary language

Language:English
Title:Impact of different tropospheric delay models on GNSS positioning quality
Abstract:
The tropospheric delay is one of the main error sources that affects the quality of GNSS positioning. Since modelling is the only way to mitigate the tropospheric delay, a proper model needs to be applied during GNSS data processing. Several different tropospheric delay models are usually implemented in modern GNSS post-processing software, so users will often not be sure which one to use. The answer to this question represents the main goal of this master's thesis. Six different tropospheric delay models that are implemented in Leica Infinity software were tested with respect to obtained GNSS baselines quality. Our analyses are based on several different data sets, each containing thirty baselines. In order to find an optimal processing strategy to obtain the best achievable position quality, different tropospheric delay models were assessed on baselines acquired in different tropospheric conditions, different daytimes and with different time span of observations, different heights of baseline endpoints and different baseline lengths.

Keywords:tropospheric delay, GNSS, positioning quality, positioning accuracy

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