NDLI: Carrier phase multipath corrections based on GNSS signal quality measurements to improve CORS observations

Content Provider	IEEE Xplore Digital Library
Author	Rost, C. Wanninger, L.
Copyright Year	2010
Description	Author affiliation: Geodetic Institute, Technische Universität Dresden, Germany (Rost, C.; Wanninger, L.)
Abstract	Carrier phase multipath caused by reflections in the vicinity of GNSS stations is a major error source of precise differential positioning. Detection and mitigation of carrier phase multipath errors can be based on signal quality measurements, i.e. signal-to-noise ratio (S/N) or carrier-to-noise ratio (C/N), as provided by GNSS receivers. Variations of the signal quality oscillation frequency are caused by changes of the reflected signal's additional path length. Calculating carrier phase multipath corrections from signal quality time series is not simple. Most published algorithms need various interim results, e.g. phase shift or attenuation factors, to calculate the final correction value. Our algorithm, however, directly estimates carrier phase multipath corrections from signal quality measurements. In order to validate the potential of this multipath mitigation method in practice, GPS/GLONASS observation data sets of six continuously operating reference stations (CORS) of the German SAPOS network were corrected. All these stations are equipped with receivers for which the signal quality based multipath mitigation performs similarly well for both frequencies. Thus multipath mitigation may even improve coordinate results based on the ionosphere-free linear combination. We present a detailed analysis of the effects of carrier phase multipath corrections on positioning results in this CORS subnetwork.
Starting Page	1162
Ending Page	1167
File Size	2390547
Page Count	6
File Format	PDF
ISBN	9781424450367
ISSN	21533598
DOI	10.1109/PLANS.2010.5507235
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Satellite navigation systems Phase measurement Global Positioning System Signal to noise ratio Phase estimation Receiving antennas Frequency Satellite antennas Transmitting antennas Position measurement CORS GNSS carrier phase multipath signal-to-noise signal quality
Content Type	Text
Resource Type	Article

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