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Open AccessArticle

IRNSS/NavIC L5 Attitude Determination

1
GNSS Research Centre, Department of Spatial Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
2
Department of Geoscience and Remote Sensing, Delft University of Technology, PO Box 5048, 2600 GA Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Sensors 2017, 17(2), 274; https://doi.org/10.3390/s17020274
Received: 10 December 2016 / Revised: 17 January 2017 / Accepted: 25 January 2017 / Published: 30 January 2017
(This article belongs to the Section Remote Sensors, Control, and Telemetry)
The Indian Regional Navigation Satellite System (IRNSS) has recently (May 2016) become fully-operational and has been provided with the operational name of NavIC (Navigation with Indian Constellation). It has been developed by the Indian Space Research Organization (ISRO) with the objective of offering positioning, navigation and timing (PNT) to the users in its service area. This contribution provides for the first time an assessment of the IRNSS L5-signal capability to achieve instantaneous attitude determination on the basis of data collected in Perth, Australia. Our evaluations are conducted for both a linear array of two antennas and a planar array of three antennas. A pre-requisite for precise and fast IRNSS attitude determination is the successful resolution of the double-differenced (DD) integer carrier-phase ambiguities. In this contribution, we will compare the performances of different such methods, amongst which the unconstrained and the multivariate-constrained LAMBDA method for both linear and planar arrays. It is demonstrated that the instantaneous ambiguity success rates increase from 15% to 90% for the linear array and from 5% to close to 100% for the planar array, thus showing that standalone IRNSS can realize 24-h almost instantaneous precise attitude determination with heading and elevation standard deviations of 0.05 and 0.10 degrees, respectively. View Full-Text
Keywords: Indian Regional Navigation Satellite System (IRNSS); Navigation with Indian Constellation (NavIC); integer carrier-phase ambiguity resolution; attitude determination; multivariate constrained integer least-squares; MC-LAMBDA Indian Regional Navigation Satellite System (IRNSS); Navigation with Indian Constellation (NavIC); integer carrier-phase ambiguity resolution; attitude determination; multivariate constrained integer least-squares; MC-LAMBDA
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Zaminpardaz, S.; Teunissen, P.J.; Nadarajah, N. IRNSS/NavIC L5 Attitude Determination. Sensors 2017, 17, 274.

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