Self-Calibration Algorithm for Precision GNSS Antennas on Moving Platforms

A.J. O'Brien, I.J. Gupta

Abstract:	GNSS antennas must be calibrated with high accuracy in order to be used in precision applications. Unfortunately, obtaining sufficiently accurate calibration measurements is a task that is commonly tedious, inconvenient or impractical. In this study, we discuss the feasibility of extending a GNSS receiver to perform self-calibration: simultaneous estimation of the navigation parameters and antenna calibration information. This self-calibration can be performed on-the-fly (i.e. during navigation) instead of being restricted to special calibration environments and procedures. Since the antenna is calibrated in-situ, platform effects will be incorporated automatically. As the platform moves, the estimate of the antenna-induced biases will steadily converge as the antenna is exposed to sufficient diversity in the angles of arriving satellite signals. Emphasis has been placed on incorporating the self-calibration logic into an add-on module that processes standard GNSS receiver outputs. Results from simulations demonstrate successful calibration of a single-element GNSS antenna.
Published in:	Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010) September 21 - 24, 2010 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	2457 - 2464
Cite this article:	O'Brien, A.J., Gupta, I.J., "Self-Calibration Algorithm for Precision GNSS Antennas on Moving Platforms," Proceedings of the 23rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2010), Portland, OR, September 2010, pp. 2457-2464.
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