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GNSS Single Frequency, Single Epoch Reliable Attitude Determination Method with Baseline Vector Constraint

Information and Navigation School, Air Force Engineering University, No.1 FengHao Road, LianHu District , Xi’an 710077, China
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Sensors 2015, 15(12), 30093-30103;
Received: 28 September 2015 / Revised: 29 October 2015 / Accepted: 6 November 2015 / Published: 2 December 2015
(This article belongs to the Section Physical Sensors)
PDF [902 KB, uploaded 2 December 2015]


For Global Navigation Satellite System (GNSS) single frequency, single epoch attitude determination, this paper proposes a new reliable method with baseline vector constraint. First, prior knowledge of baseline length, heading, and pitch obtained from other navigation equipment or sensors are used to reconstruct objective function rigorously. Then, searching strategy is improved. It substitutes gradually Enlarged ellipsoidal search space for non-ellipsoidal search space to ensure correct ambiguity candidates are within it and make the searching process directly be carried out by least squares ambiguity decorrelation algorithm (LAMBDA) method. For all vector candidates, some ones are further eliminated by derived approximate inequality, which accelerates the searching process. Experimental results show that compared to traditional method with only baseline length constraint, this new method can utilize a priori baseline three-dimensional knowledge to fix ambiguity reliably and achieve a high success rate. Experimental tests also verify it is not very sensitive to baseline vector error and can perform robustly when angular error is not great. View Full-Text
Keywords: GNSS; baseline vector constraint; ambiguity; attitude determination GNSS; baseline vector constraint; ambiguity; attitude determination

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Gong, A.; Zhao, X.; Pang, C.; Duan, R.; Wang, Y. GNSS Single Frequency, Single Epoch Reliable Attitude Determination Method with Baseline Vector Constraint. Sensors 2015, 15, 30093-30103.

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