Precise regional L5 positioning with IRNSS and QZSS: stand-alone and combined
In this contribution we analyze the single-frequency L5 positioning capabilities of the two regional satellite navigation systems IRNSS and QZSS, stand alone as well as combined. The positioning analysis is done for two different baselines, having a mix of receivers, providing ambiguity-float and ambiguity-fixed positioning for models with and without zenith tropospheric delay (ZTD) estimation. The analyses include a precision analysis of the observed signals, as well as an analysis of the ambiguity resolution performance. This is done for both the multipath-uncorrected case as well as the multipath-mitigated case. It is shown that although single-system positioning performance is rather poor, the ZTD-fixed, single-epoch ambiguity success rates (ASRs) are close to 100% when the two regional systems are combined, thus providing mm-to-cm level precision for instantaneous ambiguity-fixed positioning. When the ZTD is estimated as well, only a few additional epochs are needed to get the ASRs close to 100%.
KeywordsIRNSS QZSS Multipath Ambiguity resolution Ambiguity success-rate L5 RTK positioning
We would like to thank Septentrio for providing the receiver at station UWA0 and Dr. Sascha Schediwy from the University of Western Australia for hosting this station. Thanks are also given to IGS MGEX and CDDIS for providing the combined broadcast ephemeris on the server. Peter J.G. Teunissen is the recipient of an Australian Research Council (ARC) Federation Fellowship (Project Number FF0883188). The work of Pei Chen is funded in part by Ministry of Science and Technology of China through cooperative agreement No. 2014CB845303.
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