Usporedno parcijalna analiza točnosti relativnih odstupanja GPS i GLONASS položaja u polarnim predjelima
| Autor: | Žarković, Nikola |
|---|---|
| Přispěvatelé: | Kos, Serđo, Brčić, David, Žuškin, Srđan |
| Jazyk: | chorvatština |
| Rok vydání: | 2020 |
| Předmět: | |
| Popis: | Cilj ovog rada je prikazati usporedno parcijalnu analizu relativnih odstupanja položaja putem GPS (engl. Global Positioning System) i GLONASS (rus. Globalnaya Navigazionnaya Sputnikovaya Sistema) globalnih navigacijskih satelitskih sustava u polarnim predjelima. Ova tema je važna za uspješno vođenje broda, tj. navigacije broda u sve više prometnijim polarnim predjelima. U radu su obrađeni globalni i regionalni navigacijski sustavi koji se danas koriste i dalje razvijaju, a sve kako bi se povećala brzina i točnost prijenosa signala do korisnika za dobivanje što točnijeg položaja. U pomorskoj navigaciji netočan položaj može biti vrlo opasan, dok u oceanskoj, a posebice navigaciji u polarnim predjelima može značiti dodatno vrijeme plovidbe, dodatni utrošak pogonskog goriva a posebno nesigurnost za brod i posadu. Potreban je sve veći razvoj GNSS sustava na način da se razvijaju SBAS sustavi (engl. Satellite Based Augmentation System), odnosno WAAS (engl. Wide Area Augmentation System) sustav za područje SAD, EGNOS (engl. European Geostationary Navigation Overlay Service) sustava za područje Europe i ostali sustavi koji danas osiguravaju pokrivenost gotovo cijele zemaljske kugle kvalitetnim satelitskim signalom. Pristup ocjenjivanju pogrešaka položaja zadanih stanica učinjen je statističkom analizom skupa podataka koji sadrži zapise položaja izmjerenih na izabranim stanicama u odabranom vremenskom razdoblju. Statističkoj analizi prethodio je izbor uzorka nad kojim će se vršiti analiza, a zatim priprema podataka koja je bila neophodna. Da bi se mogla uspješno napraviti statistička obrada podataka trebalo je izabrati i kvalitetan uzorak. Nakon provjere dostupnosti podataka odabran je period ispitivanja od sedam dana i rezultati tog ispitivanja izneseni su u ovom diplomskom radu. U ovome radu može se vidjeti koji čimbenici utječu na nešto lošije određivanje položaja satelitskim sustavima u polarnim predjelima u odnosu na ostale dijelove Zemlje. Isto tako napravljena je usporedba skupa statističkih podataka o zapisanim položajima GPS sustava i GLONASS sustava iz koje vidimo kako je GPS sustav nešto točniji nego GLONASS. The purpose of this paper is to present comparative partial analysis of relative positioning deviations of GPS and GLONASS global navigation satellite systems in polar areas. This subject is of great interest for successful ship management, i.e. ship navigation in polar regions as areas of increased traffic. The paper analyses the positioning performance of global and regional navigation systems that are still in use today and continuously developing, all in order to increase the speed and accuracy of signal transmission to the final user for obtaining the most accurate position. In maritime navigation, an incorrect position can be very dangerous. Moreover, when it comes to oceans and navigation in polar regions, it can mean additional sailing time, additional fuel consumption and especially it could threaten the security of the ship and crew. This is the reason why continuous development of GNSS system is required and this development should follow improvement of SBAS system (Satellite Based Augmentation System), respectively WAAS (Wide Area Augmentation System) system for the area of United States, EGNOS (European Geostationary Navigation Overlay Service) system for European continent and other systems that today provide coverage of almost the entire globe with a quality signal. The approach to estimate the position errors was done by statistical analysis of a data sets containing records of the positioning solutions measured at the selected stations in the selected time period. To make statistical analysis, firstly was required on which the analysis will be preformed, and then the preparation of the data that was necessary. In order to be able to successfully preform statistical data processing, a quality sample had to be selected. After checking data availavility a test period of seven days was selected and the results of that test are presented in thethesis. In this paper it can be seen which factors influence the somewhat worse positioning of satellite systems in the polar regions compared to other parts of the Earth. Moreover, comparison research of a set of statistical data on the recorded positions of the GPS system and the GLONASS system was made from which we can conclude that the GPS system is somewhat more accurate than the GLONASS system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|