Procjena ionosferske i troposferske pogreške u softverskom GPS prijemniku

master's thesis

• Title (english): Assessment of ionospheric and tropospheric error in software GPS receiver
• Author: Vanja Rasinec
• Mentor: Tomislav Kos (mentor)
• Committee member: Tomislav Kos (predsjednik povjerenstva)
• Committee member: Sonja Grgić (član povjerenstva)
• Committee member: Gordan Ježić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-01, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

GPS prijemnici vrše pozicioniranje pomoću signala koji dolaze sa GPS satelita. Signali prolaskom kroz ionosferski i troposferski sloj usporavaju, mijenjaju svoj smjer kretanja te gube snagu i sve to utječe na pogrešku koja se javlja prilikom pozicioniranja. U sklopu ovog rada su proučeni načini korekcije pogrešaka, te je kreiran program koji može usporediti te pogreške za dva zadana GPS prijemnika. Postoji nekoliko načina na koji se pogreška može ispraviti, te se oni dijele na korekcije pogrešaka zbog ionosfere i korekcije pogrešaka zbog troposfere. Od posebnog značaja u ovom radu je EGNOS model, koji ispravlja pogrešku nastalu zbog utjecaja troposfere, te Klobuchar model, koji ispravlja pogrešku nastalu zbog utjecaja ionosfere. EGNOS model je korišten pri izradi programa napravljenog u sklopu ovog rada, a Klobuchar model je standardni model za ispravljanje ionosferske pogreške koji koriste GPS prijemnici korišteni u ovom radu. Program koji je napravljen služi za grafički prikaz vrijednosti pogrešaka nastalih u korištenim prijemnicima zbog ionosferskog i zbog troposferskog kašnjenja signala.

Abstract (english)

GPS receivers calculate their position by using signals from GPS satellites. GPS signals slow down, change direction and lose their intensity passing through ionosphere and troposphere and that causes calculation error in receiver to occur. In this paper various error correction methods are analyzed and as part of that a software for comparing errors between two GPS receivers is made. There exist several methods for error correction, and they are divided into ionosphere error corrections and troposphere error corrections. In this paper, particular focus is given at EGNOS model for correction of errors because of tropospheric influence, and at Klobuchar model for correction of errors because of ionospheric influence. EGNOS model is used in created software, and Klobuchar model is standard model that is implemented in two used GPS receivers.

• Keywords: prijemnik; pogreška; program; ionosfera; troposfera; GPS
• Keywords (english): receiver; error; program; ionosphere; troposphere; GPS
• Language: croatian
• URN:NBN: urn:nbn:hr:168:095292
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 11:32:27