Abstract
This paper presents Global Navigation Satellite Systems (GNSS) attitude determination approach based on solution of direction-finding (DF) problem. The carrier phase GNSS concept is used to achieve precise attitude parameters (pitch, roll and yaw angles). This approach consists in maximization of resulting functions constructed on different combinations of R-functions. Effective attitude parameters estimations are maximum likelihood estimations. Well known algorithms (least-square, QUEST, etc.) of likelihood function maximization are computationally complicated. Besides these algorithms, reference phase differences can be used to maximize likelihood function. Reference phase differences are easily implemented and have advantages in computing costs. Angles accuracy is higher, when presented approach compared to ML, when reference phase differences are used in both cases. DF concept for attitude determination is discussed in this paper. Two different modifications of resulting function using for attitude determination are considered. Efficiency of described methods is expressed in terms of angles accuracy and abnormal error rate.
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