Sturdy positioning with high sensitivity GPS sensors under adverse conditions

Kozmus Trajkovski, Klemen (author), Sterle, Oskar (author), Stopar, Bojan (author)

High sensitivity GPS receivers have extended the use of GNSS navigation to environments which were previously deemed unsuitable for satellite signal reception. Under adverse conditions the signals become attenuated and reflected. High sensitivity receivers achieve signal reception by using a large number of correlators and an extended integration time. Processing the observation data in dynamic and rapidly changing conditions requires a careful and consistent treatment. Code-based autonomous solutions can cause major errors in the estimated position, due primarily to multipath effects. A custom procedure of autonomous GPS positioning has been developed, boosting the positioning performance through appropriate processing of code and Doppler observations. Besides the common positioning procedures, robust estimation methods have been used to minimise the effects of gross observation errors. In normal conditions, differential GNSS yields good results, however, under adverse conditions, it fails to improve significantly the receiver's position. Therefore, a so-called conditional DGPS has been developed which determines the position differentially by using data from the strong signals only. These custom-developed procedures have been tested in different conditions in static and kinematic cases and the results have been compared to those processed by the receiver.

• Language: English
• Keywords: GNSS, GPS positioning, high sensitivity, differential GPS, adverse conditions, Doppler observations
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2010
• Number of pages: Str. 8332-8347
• Numbering: Vol. 10, iss. 9
• PID: 20.500.12556/RUL-32137
• UDC: 528:62
• ISSN on article: 1424-8220
• DOI: 10.3390/s100908332
• COBISS.SI-ID: 5104225
• Publication date in RUL: 10.07.2015

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 3.0, Creative Commons Attribution 3.0 Unported
• Link: https://creativecommons.org/licenses/by/3.0/deed.en
• Description: You are free to reproduce and redistribute the material in any medium or format. You are free to remix, transform, and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
• Licensing start date: 03.09.2010

Secondary language

• Language: Slovenian
• Keywords: določevanje položaja, visoko občutljivi GPS sprejemniki, diferencialni GPS, Dopplerjeva opazovanja, GPS, GNSS