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Error Analysis of GNSS Attitude Determination System

GNSS 자세결정시스템의 오차해석

  • 황동환 (충남대학교 전기정보통신공학부, GNSS 기술연구센터) ;
  • 이상정 (충남대학교 전기정보통신공학부, GNSS 기술연구센터) ;
  • 박찬식 (충북대학교 전기전자공학부, 컴퓨터정보통신연구소)
  • Published : 2006.03.01

Abstract

In this paper an error analysis of 3-dimensional GNSS attitude determination system is given. The attitude error covariance matrix is derived and analyzed. It implies that attitude errors are affected by the baseline length and configuration, the satellites numbers and geometry, receiver measurement noises and the nominal attitude of the vehicle. By defining Euler Angle Dilution Of Precision (EADOP) which is analogous to GDOP, roll, pitch and yaw errors can be efficiently analyzed. However the expression of the attitude error is too complex to get some intuitions. Therefore with a commonly adopted assumption, new expressions for attitude error are derived. The formulas are easy to compute and represent the attitude error as a function of the nominal attitude of a vehicle, the baseline configuration and the receiver noise. Using the formula, the accuracy of the attitude can be analytically predicted without the computer simulations. Applications to some widely used configurations reveal the effectiveness of the proposed method.

Keywords

References

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