Instantaneous GPS/BeiDou/Galileo Attitude Determination: A Single-Frequency Robustness Analysis under Constrained Environments

N. Nadarajah, P.J.G. Teunissen

Abstract:	In the light of modernized and new global navigation satellite systems (GNSS), the availability of satellite based positioning, navigation, and timing (PNT) solutions has been enhanced. Among existing GNSS, the Chinese BeiDou navigation satellite system (BDS) and the European Galileo system are being developed. A combined GNSS constellation will significantly increase the number of visible satellites and thus will improve the geometry of observed satellites, enabling improvements in PNT solution availability, reliability, and accuracy. In this contribution, we analyse the robustness of triple system single-frequency carrier-phase attitude determination under constrained environments. The successful resolution of the integer carrier phase ambiguities is the key to precise attitude determination using multiple GNSS antennas mounted on a platform. Making use of the known baseline length of rigidly fixed antennas the constrained Least-squares AMBiguity Decorrelation Adjustment (C-LAMBDA) method yields high integer resolution success rates. In this contribution we analyze the performance of the C-LAMBDA method and compare it to the standard LAMBDA method using single-frequency triple system (GPS/Galileo/BeiDou) observations under constrained environments. Our analyses include a simulation study with multi-path effects and a satellite outage analysis using real data from permanent stations at Curtin University, Australia. The results demonstrate the enhanced robustness that a triple system brings to single-epoch single-frequency attitude determination.
Published in:	Proceedings of the ION 2013 Pacific PNT Meeting April 23 - 25, 2013 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	1088 - 1103
Cite this article:	Nadarajah, N., Teunissen, P.J.G., "Instantaneous GPS/BeiDou/Galileo Attitude Determination: A Single-Frequency Robustness Analysis under Constrained Environments," Proceedings of the ION 2013 Pacific PNT Meeting, Honolulu, Hawaii, April 2013, pp. 1088-1103.
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