Preliminary communication
UNIVERSITY OF ZAGREB, FACULTY OF ELECTRICAL ENGINEERING AND COMPUTING
Tomislav Kos
Maja Botinčan
Ana Dlesk
Abstract
There are some fundamental limitations on positioning accuracy using satellite navigation technique. Several sources of errors limit the accuracy of GNSS (Global Navigation Satellite System) positioning. The errors due to the earth's atmosphere have the largest value and must be significantly reduced in order to achieve more precise positioning results. The GNSS-based determination of the position is based on the very accurate measurement of the satellite radio signal propagation time between the satellite and the GNSS receiver aerials. GNSS signals change the propagation speed and direction as they pass through the atmosphere on their path from the satellite to the receiver, causing positioning errors. The article deals with the methods for reducing positioning errors due to the satellite signal propagation through the earth's atmosphere.
Keywords
GNSS; positioning error; ionospheric delay; tropospheric delay; delay correction models
Hrčak ID:
45459
URI
Publication date:
23.12.2009.
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