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原文传递 Analysis of GPS-based Real Time Attitude Determination System for ITS Application.

题名：	Analysis of GPS-based Real Time Attitude Determination System for ITS Application.
作者：	D. Gebre-Egziabher; F. A. P. Lie;
关键词：	attitude, calibration, carrier phase, determination, integer ambiguity, magnitudes, phase center, real time, resolution, satellite navigation systems, single frequency, vectors, vehicles
摘要：	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.
总页数：	24p
报告类型：	科技报告