diplomska naloga
Žan Belšak (Author), Polona Pavlovčič Prešeren (Mentor), Božo Koler (Thesis defence commission member), Oskar Sterle (Co-mentor)

Abstract

V diplomski nalogi smo analizirali kakovost opazovanj GNSS ob uporabi različnih anten. Preizkusili smo anteno, vgrajeno v ohišje instrumenta Javad Triumph-LS, zunanjo anteno in najmanj dovzetno anteno za odboj signalov od objektov, ki jo imenujemo antena s kovinskim ohišjem. Po raziskavi in preverjanju kakovosti opazovanj GNSS v programih TEQC in Leica SPIDER QC smo potrdili postavljeno hipotezo, da nam antena s kovinskim ohišjem zagotovi najboljša opazovanja. V drugem delu smo preverili, ali se s pokritjem kovinske ovire z belo rjuho oz. leseno ploščo manjša odboj signala od ovire. Ugotovili smo, da se signal v največji meri odbija od kovine. Obenem smo si prizadevali raziskati, kateri so ostali dejavniki, ki vplivajo na velikost večpotja. Predvsem je potrebno paziti na višinske kote in geometrijo satelitov. Opazovanja GNSS smo na terenu izvedli s statično izmero in smo jih nato naknadno obdelali v programskem paketu Leica Geo Office, kjer smo za določitev položaja točk A in B uporabili navezavo na virtualno referenčno točko in stalno delujočo postajo. S tem smo želeli preveriti vpliv oddaljenosti referenčne točke na kakovostno določitev položaja. Ugotovili smo, da so odstopanja v horizontalni smeri milimetrskega velikostnega reda, v vertikalni smeri pa centimetrskega.

Keywords

geodezija;diplomska naloga;UNI;GIG;GNSS;Javad Triumph-LS;statična metoda;antene;večpotje;ocena kakovosti;modeliranje;program TEQC;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [Ž. Belšak]
UDC: 528.28(043.2)
COBISS: 7830625 Link will open in a new window
Views: 2064
Downloads: 733
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Quality assessment of GNSS observations using various antennas
Secondary abstract: In the diploma thesis we analysed the quality of GNSS observations when using various antennas. We tested an internal antenna, installed into a Javad Triumph-LS housing, an external antenna and the choke ring antenna, which is the least sensitive to the reflection of signals from objects. After the survey and quality assessment of GNSS observations in programs TEQC and Leica SPIDER QC we confirmed the presupposed hypothesis that the choke ring antenna provides us best observations. In second part we checked whether the coverage of the metal barriers with white sheet or wooden panel reduces signal reflection from obstacles. We concluded that the signal mostly reflects by the metal. At the same time, we also tried to explore other factors affecting multipath size. Mostly, it is necessary to pay attention to the elevation angles and geometry of the satellites. GNSS observations were performed with static method and postprocessed in program package Leica Geo Office, where we determined the positions of points A and B in two modes: virtual reference station (VRS) and permanent station. This way, the influence of distance to reference point on quality position was tested. We concluded that the deviations were of milimeter magnitude in horizontal and of centimeter magnitude in vertical direction.
Secondary keywords: GNSS;Javad Triumph-LS;static method;antennas;multipath;quality assessment;modeling;program TEQC;
File type: application/pdf
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: VIII, 35 str.
ID: 9234936