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Sensors 2016, 16(1), 1; doi:10.3390/s16010001

Instantaneous Real-Time Kinematic Decimeter-Level Positioning with BeiDou Triple-Frequency Signals over Medium Baselines

1,2
,
1,2,* , 1,2,* and 1,2
1
School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
2
Collaborative Innovation Center for Geospatial Technology, 129 Luoyu Road, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Anton de Ruiter
Received: 24 October 2015 / Revised: 5 December 2015 / Accepted: 17 December 2015 / Published: 22 December 2015
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [1716 KB, uploaded 22 December 2015]   |  

Abstract

Many applications, such as marine navigation, land vehicles location, etc., require real time precise positioning under medium or long baseline conditions. In this contribution, we develop a model of real-time kinematic decimeter-level positioning with BeiDou Navigation Satellite System (BDS) triple-frequency signals over medium distances. The ambiguities of two extra-wide-lane (EWL) combinations are fixed first, and then a wide lane (WL) combination is reformed based on the two EWL combinations for positioning. Theoretical analysis and empirical analysis is given of the ambiguity fixing rate and the positioning accuracy of the presented method. The results indicate that the ambiguity fixing rate can be up to more than 98% when using BDS medium baseline observations, which is much higher than that of dual-frequency Hatch-Melbourne-Wübbena (HMW) method. As for positioning accuracy, decimeter level accuracy can be achieved with this method, which is comparable to that of carrier-smoothed code differential positioning method. Signal interruption simulation experiment indicates that the proposed method can realize fast high-precision positioning whereas the carrier-smoothed code differential positioning method needs several hundreds of seconds for obtaining high precision results. We can conclude that a relatively high accuracy and high fixing rate can be achieved for triple-frequency WL method with single-epoch observations, displaying significant advantage comparing to traditional carrier-smoothed code differential positioning method. View Full-Text
Keywords: BeiDou; triple frequency; carrier-smoothed code (CSC); extra-wide-lane; wide-lane; ambiguity resolution; differential positioning BeiDou; triple frequency; carrier-smoothed code (CSC); extra-wide-lane; wide-lane; ambiguity resolution; differential positioning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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He, X.; Zhang, X.; Tang, L.; Liu, W. Instantaneous Real-Time Kinematic Decimeter-Level Positioning with BeiDou Triple-Frequency Signals over Medium Baselines. Sensors 2016, 16, 1.

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