A Super-Fast Integer Ambiguity Resolution Approach to GPS Interferometric Heading Determination for the Application in a Low Cost Integrated GPS/Inertial Navigation System

Rongsheng Ken Li

Abstract:	This paper presents a super fast integer ambiguity resolution algorithm for the determination of heading using carrier-phase Interferometric method. This method is applicable to the situation when attitude is knowu and only headmg is to be determined. A typical application is for the initial alignment and heading updates of low-cost integrated GPS/Inertial navigation system where the initial gyro bias is too big to perform gyro compassing. The algorithm takes the full advantage of the fact the attitude is known both in terms of improved observability and in terms of efficient computational requirements. & the result, only an one-dimensional search over a small range needs to be performed, which is orders of magnitude faster than the method currently used in many systems. The algorithm is being mcorporated into the Lear Astronics Piber Optic Gyro based mtegrated GPWInertial navigation system named as NW (Nav Sensor Unit) where two separate low-cost GPS receivers are used to perform the heading determination.
Published in:	Proceedings of the 1996 National Technical Meeting of The Institute of Navigation January 22 - 24, 1996 Loews Santa Monica Hotel Santa Monica, CA
Pages:	83 - 88
Cite this article:	Li, Rongsheng Ken, "A Super-Fast Integer Ambiguity Resolution Approach to GPS Interferometric Heading Determination for the Application in a Low Cost Integrated GPS/Inertial Navigation System," Proceedings of the 1996 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1996, pp. 83-88.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In