Single-Frequency Integer Ambiguity Resolution Enabled GPS Precise Point Positioning
Publication: Journal of Surveying Engineering
Volume 138, Issue 4
Abstract
High-precision (centimeter-level) real-time kinematic precise point positioning (PPP-RTK) becomes feasible when using precise corrections, as received from a regional Continuously Operating Reference Station network. These network corrections comprise (biased) satellite clocks, (biased) satellite phase biases, and ionospheric delays, where the latter ones are interpolated to the approximate location of the PPP-RTK receiver. Thus far, very fast PPP-RTK integer ambiguity resolution performance has been reported based on dual-frequency Global Positioning System (GPS) data. The availability of ionospheric corrections enables one to carry out PPP-RTK using a single-frequency receiver. Despite that single-frequency integer ambiguity resolution based on a single epoch of data cannot often be successful, fast integer ambiguity resolution is possible when accumulating a short time span of data, assuming that the ambiguities are time constant. In this paper, results of the performance of single-frequency PPP-RTK for both a high-grade geodetic receiver and a low-grade mass-market receiver are presented. The experiments have been conducted based on corrections determined from the GPS Network Perth. The conclusion reads that single-frequency PPP-RTK integer ambiguity resolution is feasible, even using a low-cost receiver: following an initialization time of about 4 min on average, the correct integers can be resolved in real-time, thus providing centimeter-level positioning.
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Acknowledgments
This work has been executed in the framework of the Positioning Program Project 1.1 (“New carrier phase processing strategies for achieving precise and reliable multi-satellite, multi-frequency GNSS/RNSS positioning in Australia”) of the Cooperative Research Centre for Spatial Information (CRC-SI2). Peter J. G. Teunissen is the recipient of an Australian Research Council (ARC) Federation Fellowship (project number FF0883188). The CORS network data has been provided by the GPS Network Perth. All this support is gratefully acknowledged.
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Published In
Journal of Surveying Engineering
Volume 138 • Issue 4 • November 2012
Pages: 193 - 202
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Aug 24, 2011
Accepted: Feb 28, 2012
Published online: Mar 8, 2012
Published in print: Nov 1, 2012
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