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IRNSS/NavIC L5 Attitude Determination.

Safoora Zaminpardaz¹, Peter J G Teunissen^2,3, Nandakumaran Nadarajah⁴

¹GNSS Research Centre, Department of Spatial Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia. safoora.zaminpardaz@postgrad.curtin.edu.au.

Sensors (Basel, Switzerland)

|February 2, 2017

Summary

This summary is machine-generated.

The Indian NavIC satellite system (IRNSS) enables precise attitude determination using its L5 signal. Evaluations show high success rates for instantaneous attitude determination with NavIC, even with limited antennas.

Keywords:

Indian Regional Navigation Satellite System (IRNSS)MC-LAMBDA Navigation with Indian Constellation (NavIC)attitude determination integer carrier-phase ambiguity resolution multivariate constrained integer least-squares

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Area of Science:

Satellite Navigation Systems
Geodesy and Geomatics Engineering

Background:

The Indian Regional Navigation Satellite System (IRNSS), now NavIC, is operational.
NavIC aims to provide positioning, navigation, and timing (PNT) services.
Accurate attitude determination is crucial for various applications.

Purpose of the Study:

Assess the IRNSS L5 signal's capability for instantaneous attitude determination.
Evaluate performance using data collected in Perth, Australia.
Compare different methods for resolving carrier-phase ambiguities.

Main Methods:

Utilized data from a linear array (two antennas) and a planar array (three antennas).
Employed the LAMBDA method (unconstrained and multivariate-constrained) for ambiguity resolution.
Analyzed double-differenced (DD) integer carrier-phase ambiguities.

Main Results:

Instantaneous ambiguity success rates improved significantly with antenna arrays.
Success rates increased from 15% to 90% for the linear array.
Success rates reached nearly 100% for the planar array.

Conclusions:

Standalone IRNSS (NavIC) can achieve precise, instantaneous attitude determination.
Achieved heading and elevation standard deviations of 0.05 and 0.10 degrees, respectively.
Demonstrated the effectiveness of NavIC L5 signals for attitude determination.