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Sturdy Positioning with High Sensitivity GPS Sensors Under Adverse Conditions
Kozmus Trajkovski, Klemen (Author), Sterle, Oskar (Author), Stopar, Bojan (Author)

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Abstract
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:GPS positioning, high sensitivity, GNSS
Tipology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2010
Publisher:MDPI AG
Number of pages:str. 8332-8347
Numbering:Letn. 10, št. 9
UDC:528:62
ISSN on article:1424-8220
DOI:10.3390/s100908332 Link is opened in a new window
COBISS.SI-ID:5104225 Link is opened in a new window
Views:757
Downloads:350
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Record is a part of a journal

Title:Sensors
Publisher:MDPI
ISSN:1424-8220
COBISS.SI-ID:10176278 This link opens in a new window

Secondary language

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

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