Dual-frequency Attitude Measurement System’s Software Design Based On BD2

Attitude Measurement System (AMS) that is based on navigation satellites is to determine motion object’s (spacecraft,aircraft,vehicle ect.) attitude (heading, pitch angle and roll angle) by using GPS or BeiDou navigation satellites technology.It is the key technology of nautical and terrestrial navigation.it also plays an important role in military,civil and commercial,and has a broad application prospects.Now, with the rapid development of BeiDou technology, the method by using BeiDou carrier phase difference technology has become an focus of research and application. With high error, low accuracy, long initial time, low success rate of Attitude Measurement, which is based on single frequency singal.Therefore, this article focuses on the study of Dual-frequency attitude measurement technology of the Beidou satellite signal.we design the new style Dual-frequency Attitude Measurement System’s method and its Software,based on the existing methods and technology, then, verify the validity of the algorithm by conducting experiments.In this paper, the main content and innovations are as follows:(1) This paper researches the method of LAMBDA method combing with TCAR method to estimate the integer ambiguity. In the paper, it used the mid-lane combination based on Beidou II, for the determination of attitude measurement,it discussed the characteristics and shortcomings of the existing Dual-frequency ambiguity resolution algorithms which is a key and difficult problem. We studyed combing LAMBDA and TCAR algorithms to resolve the integer ambiguity.The method is helpful to improve the accuracy and success rate of the integer ambiguity through the experimental comparison.(2) This paper proposed Dual-frequency Carrier attitude hierachical checkout method (a paten had been published). In the Dual-frequency Attitude Measurement Based on BD2. How to selected the correct solution from a plurality of integer ambiguity solution candidates is a key problem in the paper, it proposes the use of baseline length as constraints, while giving the level of baseline angle increment change and check the baseline attitude solution results, which from a number of integer ambiguity solution candidates and selected the correct solution, The method can improve the ambiguity resolution success rate and efficiency, and has wide application prospect.