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Please use this identifier to cite or link to this item: http://hdl.handle.net/11299/140894

Title: Analysis of GPS-based Real Time Attitude Determination System for ITS Application
Authors: Gebre-Egziabher, Demoz
Lie, Fidelis Adhika Pradipta
Keywords: RTK
Carrier phase
Single frequency
Attitude (Flight dynamics)
Integer ambiguity
Phase center
Global Positioning System
Satellite navigation systems
Issue Date: Nov-2012
Publisher: Intelligent Transportation Systems Institute, Center for Transportation Studies, University of Minnesota
Series/Report no.: CTS
Abstract: This work describes the development and testing of GPS-based attitude and heading determination system (AHRS) using single-frequency (L1) carrier phase differential GPS (CPDGPS). Vehicle's attitude can be uniquely determined from two non-collinear relative position vectors, known as the baseline vectors. The accuracy of the resulting attitude estimate depends on the accuracy of the baseline vector estimates and their respective magnitudes (length). The shorter the baseline, the higher the vector accuracy required to give the same attitude accuracy that can be obtained through longer baseline system. Issues such as ambiguity resolution and phase center variations are discussed. Test result shows that single-frequency CPDGPS is still a challenge, mainly caused by the integer ambiguity problem inherent to CPDGPS problem. A more feasible but less accurate method using a short baseline is also discussed. Phase center calibration remains a challenge for this attitude determination system.
URI: http://purl.umn.edu/140894
Appears in Collections:Research Reports

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